Some Alidropship plugins that rely on the main plugin disable themselves when the main Alidropship plugin is disabled. When any plugin is updated, even automatically, your site is temporarily put into maintenance mode and the old plugin is deleted and the new one downloaded, installed and then the site is taken out of maintenance mode.
I'm guessing that when the Alidropshipship plugin is updated, and during those few seconds after it's deleted, it's possible that it's replacement with the new one is taking just a little too long, maybe because of slow internet, slow hosting or who knows what ... and the other Alidropship plugins disable themselves.
If it's too much of a problem, write to
support@alidropship.com and let them know. Maybe there is a delay time in the scripts for the plugins disabling that can be increased by an extra 30 seconds or so.
Just a guess.