Woocommerce keeps deactivating on different subsites

Hello Guys.

I have a problem since I installed Woocommerce on my network. It keeps deactivating randomly. One time it deactivated when pop-up plugin got activated - sometimes it just deactivates when no one touches the backend or frontend.. It only deactivates on a specific site at the time, but does it on all of my different subsites. Sometimes it happens every day, sometimes it happens with a couple of days between.

It happens on different themes, some with a lot of different plugins, but also some with no other plugins than woocommerce. I've tried to locate if there is a specific plugin that causes it, but can't seem to figure out what is causing it.

Do you know what can cause this?