z-push deleted emails reapear

Hi All,

Running below versions:

“ZPUSH_VERSION”, “2.6.4+0-0”
kopano-server 11.0.2
Release: 10
Codename: buster
PHP 7.3.31-1~deb10u1 (php-fpm)
nginx version: nginx/1.14.2

My problem is that z-push seems to be slow when deleting emails for example. If i delete mails on my phone sometimes the emails will reapear after emptying the bin. it is really anoying.

There are no strange errors in nginx zpush logs. where do i need to search?

i use mysql database for state machine (z-push)

Can someone assist me?

Kind regards,

Chris