Faulting MAIL App

iOS Version  : 26.1
Model Name   : iPhone 16 Pro Max
Model Number : A3296
Affected App : Apple Mail

Good day to you all

I'm having intermittent issues with Apple Mail where the Mail App will constantly display the following messages just below the INBOX folder of a mailbox when the Mail App is open:

• John Ness (GMX) • Updated Just Now
• Updating...
• Downloading...

It will keep on alternating between the messages.

I have done the following based on other postings in the community:

• Turned off PUSH in the Mail settings
• Set FETCH interval to 30 minutes
• Restarted Mail App
• Restarted iPhone
• (Previously: deleted Mail App & reinstalled Mail App)

I currently have five mailbox accounts set up:

1. John Ness (GMX) [IMAP]
2. John (Ness) [IMAP]
3. xxxx (Ness) [IMAP]
4. John Ness (Openair St.Gallen) [IMAP]
5. iCloud [presumably IMAP]

The issue can occur with the 1st account or in the 4th account.

I have deleted some other accounts, because deleted e-mails kept reappearing in those accounts.

Questions:

1. Is there going to be a fix for this? I have read multiple threads with similar issues.
2. Is this problem a known issue with certain IMAP and/or POP providers?
3. Is Apple looking into this issue or will I have to switch to alternate non-Apple products?

I appreciate your time and I am looking forward to a real solution.

Best regards, John