So... This week is fun........ Said no one ever

Anyone else run into this glitch? Exploring in Zaejin keep scouting till there’s a Goblin king kill off the other troops then let him make goblins and kill them. I did this for 45min should’ve had something like 50-60 snot stones but when I kill him and end the battle I get a system error message and zero snot stones. I did this a dozen or so times always with the “system error” message popping up at the end of the battle. I then tried to see the max # of goblins I could kill without a system error and 10 was the max. Very annoying I must say.