Thunderbird-extremely slow

[Thunderella-25]

 Extremely slow movement from e.g. Sent to Trash ... or similar. Slow to delete from Trash. Sometimes I have to close the app and restart ... to finish / see the actions taken ... e.g. see deleted items appear in Trash or Trash being empty.

Please fix or let me know what I can do about it.

Thanks

[Steen5]

I notice the same the last month or two, but occationally. Every transaction takes seconds before excecuted, when Thunderbird goes into "slow mode".  I'm a bit curious if it is in connection with Windows Defender, but it should work with that. Hope somebody can give input.