Thunderbird messing up the index, or ISP?

Hi, Please see photo: https://paste.opensuse.org/98198687 It is the INBOX folder of this account, over IMAP at my ISP. As you can see, the contents of the email do not match at all what is shown in the panel above. If I look up the same email in Alpine, it shows "differently". A different corruption, I have it saved on a file. What I'm going to do, is move the contents of the entire remote folder to a local folder, then back. The other alternative is tell Thunderbird to correct the inxdex. Has happened to me four times recently, since the update to Thunderbird 78.x (Leap 15.1). Also coincidentally, I tried an IMAP filter at my ISP. -- Cheers / Saludos, Carlos E. R. (from 15.1 x86_64 at Telcontar)