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.


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Posted on May 22, 2025 6:48 AM

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Posted on Jun 4, 2025 3:28 PM

Having same issue. When I try to open mail app, greeted with a blank white screen. Need to force close the app and reopen several times before it works. Most of the time I'll need to reboot the phone.


iPhone 12 Pro Max 256gb

iOS 18.5

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Jun 4, 2025 3:28 PM in response to bloody_x

Having same issue. When I try to open mail app, greeted with a blank white screen. Need to force close the app and reopen several times before it works. Most of the time I'll need to reboot the phone.


iPhone 12 Pro Max 256gb

iOS 18.5

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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.

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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.

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Jun 4, 2025 3:09 AM in response to bloody_x

i have yahoo mail (accessed via phone Mail settings not App) & it too is freezing. Plus when I open box sometimes the page is blank, all mail is missing. I can stop it by turning the phone on & off but within a few sessions of checking Mail it does it again. Only started after 18.5 update.

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May 29, 2025 6:15 PM in response to bloody_x

I had to reinstall my 2 gmail accounts several times and a IMAP mail account. One gmail account is working correctly at this time. The second gmail account brings up a screen to select the appropriate server each time I attempt to send an email. The IMAP account is working.



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Jun 5, 2025 1:38 PM in response to kayeemeem

No, Apple does not come here for information. This is strictly user to user. If you wish to have Apple be aware you are experiencing an issue, you need to either contact Apple Support, or use the Feedback link, Product Feedback - Apple Apple needs to be made aware before they can work on something.

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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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