comment from admin menu, rebuild cache?

Did you have activated the “Flush the cache at new comments” option in the settings?

All the best,
Torsten

Yes this setting is already activated, but it seems as if it’s working only on the frontend.

Confirmed. I can reproduce this, so it’s a bug. I will inform our developers. Thanks for the report of the bug!

All the best,
Torsten

This will be fixed in the next release, so I’m marking this as resolved.