Curious if there are no mobs in the current mesh if there could be an option to return to a specific point (marker, even) to wait for spawn?
have you tried setting a grind marker ?
Currently the bot will return to your marker if its over 200 yalms away when grinding, but there's no code in place to return for any other reason. The entity detection range is quite large...I don't see how it would help finding mobs to make it return to the marker.