128.5.0esr (64-bit) / Windows After a dozen or so minutes from starting, TB goes into a kind of suspended mode - it does not receive emails, and the bottom progress bar (from Activity Manager) remains unchanged (for example: it indicates 50% progress, but after clicking on it, Activity Manager does not show any ongoing activities) until TB is closed. I have 6 supported accounts + local. I have already reduced the number of supported emails lying in the mailboxes for the test, I have turned off indexing. The problem still occurs. How can I investigate what is taking up TB so much (that it cannot receive emails) when Activity Manager does not indicate any activity? Best Regards.