Emails not moving to different folder when dragged

[Debskinner]

Hi
I have an intermittent problem with moving emails from my inbox to other folders. I am using unified folders for inbox (I have 10 email addresses) & quite a number of subfolders in local folders, some of which also have subfolders. When I drag email(s) to another folder usually they just move, but sometimes they don't. Right clicking & selecting move also doesn't work. This quite often happens for only one folder & I can still move emails to other folders. I have found that restarting TB generally fixes the problem.
I have compact folders turned on.
TB 60.6.1
Win 10 home v 1809
16GB RAM
Any suggestions? It's not critical, just a bit irritating
Thanks

[DanRaisch]

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

[Debskinner]

The accounts used mostly are IMAP. I have a couple of accounts that are basically not used & they're POP

[DanRaisch]

Right click on the name of each folder showing that problem and select "Properties" from the context menu, then click on the "Repair Folder" button to cause Thunderbird to rebuild the index file. https://www.lifewire.com/repair-folders ... rd-1173102

[Debskinner]

Thanks. Will give it a go. This only happens occasionally (often when I have already moved a number of emails into that particular folder, so it may be a while before I know if this worked