iOS 18.5 Mail app stuck on loading screen when forwarding or replying to emails with images in Microsoft 365 accounts

Hello. Ever since iOS 18.5 has come out those users in my environment are complaining that when they forward or reply to an email, it is stuck on the compose screen showing "LOADING" for a very long time. This seems to only be happening with emails that have images in it. The email accounts in question in their mail app are Microsoft 365. Is anyone else seeing this? Our users who have not yet updated to iOS 18.5 do not seem to be complaining about this issue and if I open and forward the same email on their devices, it loads right away whereas those on 18.5 are sitting on the loading screen.


[Re-Titled by Moderator]

Posted on May 22, 2025 6:48 AM

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88 replies

Jun 3, 2025 11:28 AM in response to bloody_x

In the past three days, I put my phone on the charger overnight and I can hear the notification sounds coming from the phone for the Mail app and when I wake up in the morning, I take it off the charger and see the Lock Screen notifications for all the Mail messages. I open the Mail app to read the messages and when I open the Mail app, it is completely empty, blank, for every folder, except at the bottom, it tells me how many unread messages there are. So luckily, a hard restart of the phone fixes this problem. I close all open apps before I go to bed and put on the charger. Using 18.5. Submitted a bug report feedback to Apple Feedback regarding this glitch.

Why should I have to restart my phone every single morning just to read my email? Apple, do better. It seems like EVERY update comes with more problems than solutions.

Jun 4, 2025 12:17 PM in response to Taittinger1980

Getting something very similar myself but with a few differences. Apple Mail will open and display the inbox. Sometimes some emails are missing (it shows a blank entry where an email should be). Additionally tapping an email does nothing, in fact the whole mail app becomes unresponsive. Going back to the Home Screen then Closing the app doesn’t fix it either, so the only way round it is to reboot the phone after which mail seems to be alright for a little while.

Jun 4, 2025 3:23 PM in response to bloody_x

same. Following.

Since 18.5 (iPhone 14Pro), when I launch the Mail app, it just sits there with a white screen. Locking up my phone from any other input. Notifications continue to appear along the top, but nothing else until the Mail app crashes and disappears. I try to relaunch the Mail app, same behavior. Eventually, after some resters, I can get into the Mail app but it is molasses slow until I just give up.

Jun 4, 2025 6:05 PM in response to bloody_x

What is happening on my iPad mini after updating to OS 18.5, is that I have flagged email in my inbox. As I read thru each 1, I unflag it unless it needs further attention. Then I delete the unflagged items or move them to a different folder. But now: often the folder where I want to put the message is grayed out-so I have to send each to the trash & then from there I can put it in the desired folder. Also several items I have unflagged & moved now return to my inbox again (often marked as flagged again)! The last update was bad enough when the added an extra step just to move a piece of mail. Very annoying!😡

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iOS 18.5 Mail app stuck on loading screen when forwarding or replying to emails with images in Microsoft 365 accounts

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