Are you using the method by @destructure00? What I’m seeing is that most people find that method to be highly reliable and much better than the alternatives.
[HOW TO] SmartThings Presence reporting using Tasker/SharpTools/AutoLocation
It looks like @NoWon provided some helpful comments in post #89 showing how to change the AutoLocation geofences to properly trigger in Tasker by changing them to manual names.
Note that neither CoRE nor SharpTools can determine your location alone. You’ll still need something that understands your location, like Tasker and the Wifi Near profile or AutoLocation and geofences. From there, SharpTools makes the integration between Tasker/AutoLocation and your Virtual Presence device on SmartThings easy. And once your Virtual Presence is updated, you can react to it however you want in CoRE.