OMV having trouble with docker's permissions (sock)

Hi

I installed OMV6 on my DIY NAS and installed docker trough OMV extras.

It works well, but I encounter one problem : permissions.

I tried to installed a mail server (mailcow) and GitLab. In both cases, i encounter an issue with mysql.sock file, which is modified by openmediavault-webgui [999]. (screenshot below)

I changed my docker root location in the plugins settings.

I don't know why, but sock files are always modified by OMV and it changes the user's rights to replace them by openmediavault-webgui [999].

It prevent a lot of containers to start properly, like mysql.

Any clues or fix on going ?

Thanks for your help

Have a nice day!