Synchronisation Problems with GDATA Total Security

Hi there,
the following issue is still a huge Problem for me. I’m using MS Windows 11 (same issue with Win10) and GDATA Total Security. I use the GDATA proxy with certificate, which I imported correctly.

If I deactivate email scanning, synchronisation speed is fine. But I really want my emails to be scanned.
So with activated email scanning eM-Client is very very slow and stops with error most time. Other email clients as outlook or thunderbird doesn’t have that problem at all. Support from GDATA checked my configuration and it’s fine.

Can you please check your implementation regarding this issue. It would be the only way to continue using the eM-Client if this problem were solved.

Kind regards