Similar - 7.8 crashing all the time, requiring shutting down the service and then restarting AG to get it working again - quite frustrating. No problems prior to the auto-update to 7.8
Note: I suspect this is happening when filters are automatically updated.
Sorry to dig up an old post, but this is actually on topic for me.
We have lots of equipment on the local networks that use web-based management interfaces, which AdGuard always interferes with, and it is always a source of frustration until you remember that you need to turn AdGuard off to...