The GNOME bugreport is mentionind Evolution version 2.24 and is quite old.
Anyway, my problem existed for only one of my two IMAP accounts I am using in evolution. After "evolution --force-shutdown", deleting all the mails in .evolution/mail/imap/<AFFECTED_ACCOUNT> and restarting evolution again the problem seems to have vanished.
I still do not know what has caused the issue. Eventually I will find out how to reproduce this.
The GNOME bugreport is mentionind Evolution version 2.24 and is quite old.
Anyway, my problem existed for only one of my two IMAP accounts I am using in evolution. After "evolution --force-shutdown", deleting all the mails in .evolution/ mail/imap/ <AFFECTED_ ACCOUNT> and restarting evolution again the problem seems to have vanished.
I still do not know what has caused the issue. Eventually I will find out how to reproduce this.