oh there can be many reasons. i had a time where i used my node stupidly to fire up a mutinee wallet...that seemed to cause force closes to blast through my node. another time i decided to use CLBoss and that like instantly caused some force closes ( not sure why). then there are complete mystery ones that i just dont have enough info to or knowledge to figure out. so yes huge time sink and headache. i think blixt or zeus embedded with a few private channels is as far as most need to venture into lightning land.