TB91.1.0, "Run Now" at filter setting does not work

[takfuji]

[Problem report]
The "Run Now" button in the message filters window does not work.
It was working up until recently, but I found it does not work today. This seems to be after updating.

[Problem recreation]
1. Have a mail in inbox. Pick any keyword in body or subject.
2. Open /Tools/Message Filters/, create new filter, give filter name, check "Mach any of,,", assign filter condition,
assign performing action. Click OK.
3. In the Message Filters window, click "Run Now".

[Expected result]
The mail in inbox must be treated immediately, say be moved to Spam folder.

[Actual result]
Nothing happens.

TB Version is 91.1.0 (64bit)
/Tools/Run Filters on Folder/ does work, so we have circumvention.

rgds
Tak

[DanRaisch]

How is the account set up, as POP or IMAP? In Thunderbird the menu path is Tools->Account Settings->Server Settings->Server Type at the top right of the dialogue.

[takfuji]

It's POP3.
Connection is SSL/TLS, port 995. I do not think this is server type related, as the action is totally inbox to spam folder operation.
Tak