[Users] Weird certificate update popups

[mi]

Can someone explain to me this certificate change popup ?

All for the same host and mail address:

- it got this popup for receiving yesterday

- i got it for sending yesterday, too.

As expeced, both extendet the validity to 2026-02-25 (for one year).

- i got the exact same popup today, for sending !

- and now within the same claws session,  i just got this cert (attached):

It shows a "Known Certificate" a correct new cert expiry date of 2026-02-26 but tries to revert to a new one with expiry of 2025-02-22 !

What is going on here ??