iOS 18 Bug in Messages App Causes Crashes, Data Loss

Apple’s latest software update, iOS 18, introduces exciting features, but unfortunately, it also comes with a bug in the Messages app that can cause repeated crashes and potential data loss. This issue appears when replying to a shared Apple Watch face in a threaded conversation within Messages. While a fix from Apple is expected, here’s what you can do to avoid triggering the bug and prevent losing important messages and attachments.

Understanding the iOS 18 Messages Bug

The iOS 18 bug in Messages affects users when engaging with threaded conversations that include shared Apple Watch faces. Here’s how the bug manifests:

  • When someone shares an Apple Watch face from watchOS, replying within the thread triggers repeated crashes of the Messages app.
  • This issue impacts both users in the conversation, rendering the thread unusable until a drastic fix is applied.

Key Insight: To avoid this problem, do not reply in a thread after receiving a shared Apple Watch face.

How to Avoid the iOS 18 Messages Crash Bug

To prevent triggering this iMessage crash bug, follow these guidelines:

  • Avoid replying to any shared Apple Watch face in a threaded message.
  • If someone shares a watch face, reply outside the thread or do not respond at all until a fix is issued.
  • Turn off thread replies temporarily if you frequently engage in Apple Watch-related conversations.

What Happens When the Bug Occurs?

If the bug is triggered, the following issues may arise:

  • Messages will repeatedly crash when attempting to open the affected conversation.
  • Other conversations may also become difficult to manage due to the crashes.
  • This bug is triggered specifically when replying in a thread to a shared Apple Watch face. Replying directly or outside the thread may not cause the crash.

Important note: Once triggered, both users in the conversation will experience the crash, and fixing it may result in data loss.

The Fix: Potential Data Loss

Unfortunately, the only immediate solution to this problem involves deleting the entire conversation:

  • Delete the conversation thread to stop the Messages app from crashing.
  • This will result in losing all chat history, including photos, videos, and attachments that haven’t been backed up or saved elsewhere.

Warning: If you restore the conversation from the recently deleted section in Messages, the bug will re-trigger, causing the app to crash again.

Is a Fix Coming?

Apple is expected to release a patch to fix this issue in an upcoming iOS 18 update:

  • The bug affects multiple devices, including those running iOS 18.1 beta, iPadOS 18.1 beta, and macOS 15.1 beta.
  • Waiting for an official patch will help avoid data loss, but until then, it’s crucial to avoid triggering the bug by not replying to shared Apple Watch faces in a threaded message.

What You Can Do to Protect Your Data

To minimize the risk of data loss:

  • Back up your data regularly using iCloud or other backup services.
  • If the Messages app crashes repeatedly, try force-closing the app and deleting the problematic conversation from another device or through iCloud.
  • Consider avoiding Apple Watch face sharing through Messages until Apple issues a fix.

Tip: If data has already been lost, restoring from a recent backup might help, but users relying on Messages in iCloud may face difficulties recovering specific messages.

Why Does This Bug Happen?

The bug stems from how watchOS and iOS 18 handle the sharing of Apple Watch faces in threaded messages:

  • Apple Watch’s watchOS 11 includes a feature that lets users share personalized watch face configurations through Messages.
  • The problem occurs specifically when replying in a thread that contains a shared watch face, causing the app to crash due to a conflict in how the message is processed.

MacReview’s Take: Stay Alert and Protect Your Data

In the meantime, as we await an official fix from Apple, it’s essential to stay vigilant when using the Messages app on iOS 18. Avoiding replies in threads containing shared Apple Watch faces is a simple precaution that can prevent the app from crashing. Regular data backups are key to ensuring that your important conversations, attachments, and memories are safe from potential loss. Finally, spread the word to others who may be unaware of the bug—helping them avoid the frustration of losing valuable data. With these steps, you can safely navigate this issue until Apple resolves it in future updates.

The MacReview YouTube Channel

The MacReview YouTube Channel

Visit Our
Youtube Channel

Watch Anywhere, Anytime!

Three iPhones on a dark background with pink lighting showing the ChatGPT and Apple Music connection flow, including an "Apple Music" app page with a Connect button, a "Connect Apple Music" permissions dialog, and a ChatGPT chat generating a holiday song playlist.
Apple Music now works as a ChatGPT extension, so you can search tracks and build playlists using plain language. Here is how to set it up and use it.
Reward your inbox with the TPG Daily newsletter img

Subscribe to Our Newsletter

REWARD YOUR INBOX WITH THE MACREVIEW NEWSLETTER

Microsoft 365 wordmark surrounded by glossy app icons for Word, Excel, PowerPoint, Outlook, OneNote, Exchange, and Microsoft 365 on a soft light background.

Microsoft 365 experienced a significant service disruption affecting business and enterprise customers across North America. The outage impacted core productivity services including Outlook email, Microsoft Defender, and administrative portals, leaving users unable to access critical business tools for several hours. […]

Wireless printer with WiFi signal icon representing Apple AirPrint enterprise printing

When Apple introduced AirPrint in 2010, enterprise IT administrators largely dismissed it as a consumer-focused feature. More than a decade later, AirPrint has fundamentally transformed how organizations handle printing infrastructure, forcing the entire industry to abandon complex driver management in […]

Password Utility Solves the FileVault Reboot Problem for Remote Mac Management

Managing remote Macs presents unique challenges, particularly when FileVault encryption creates accessibility issues during restarts. A new utility from Twocanoes Software addresses this long-standing problem for IT administrators who need reliable access to devices deployed across distributed locations. The FileVault […]

Small smart display on an entryway wall by the front door, the spot many pick for an Apple HomeView wall mount
Apple sells HomeView as two $299 models, and only one of them goes on a wall with a Schneider Home Power Mount. Here is how the tabletop and wall versions differ and which one fits your home.
Man working on a laptop in a modern office at night with “Creator Studio” text and Apple logo above, plus floating creative app icons in the foreground.

Apple is reportedly planning to expand its subscription bundle offerings and introduce more paid features across its software ecosystem, following the launch of Apple Creator Studio last month. The company appears to be evaluating opportunities to monetize additional areas of […]

Three iPhones on a dark background with pink lighting showing the ChatGPT and Apple Music connection flow, including an "Apple Music" app page with a Connect button, a "Connect Apple Music" permissions dialog, and a ChatGPT chat generating a holiday song playlist.
Apple Music now works as a ChatGPT extension, so you can search tracks and build playlists using plain language. Here is how to set it up and use it.
Hands hold a glowing smartphone at a sunlit kitchen table beside a laptop, a fix for Siri AI not working
Siri AI is a beta you have to request, so a missing assistant is usually a setup issue rather than a bug. Here are seven things to check, easiest first, and when to simply wait.
Apple Arcade games available across Apple devices

In 2025, you’ll notice significant changes in Apple Arcade’s fan favorites, as exclusive updates aim to refine and enhance your gaming experience. Titles like WHAT THE CAR? and Hello Kitty Island Adventure are set to receive major gameplay improvements, alongside […]

Resident Evil 2 on iPhone, iPad and Mac

With the anticipated release of Resident Evil 2 on iOS and macOS, set for December 10, 2024, fans of the franchise are on the edge of their seats. This iconic survival horror game promises a refreshed experience tailored for mobile […]

Hands near an open laptop and phone on a kitchen table, ready to switch from Chrome to Safari
Apple's new Switch to Safari campaign makes a strong case for leaving Chrome. Here is how to move your bookmarks, history and passwords on Mac, iPhone and iPad, and what does not come along.
Phone playing an audiobook beside earbuds and a paperback on a park bench, tracking Spotify audiobooks listening hours
Spotify is bringing audiobooks to more than 180 markets, with 12 hours a month included in eligible Premium plans. Here is how that time is counted, how to check what is left and how to buy more.
Sign Up For Newsletter mobile

Catch The Latest

Sign Up For Newsletter

Updated October 2026 for iOS 27, iPadOS 27 and macOS. Quick answer: There are 8

Apple Music now works as a ChatGPT extension, so you can search tracks and build
A new Health Sensing System, heart rate every five seconds, a 0-to-10 readiness score, and
Six laser-cut blades, four aperture stops, and a 2nm chip. Here is every confirmed iPhone
Scroll to Top