While progressing through the cave a new bat type of enemy is introduced. I've noticed that these monsters can sometimes glitch and become untargetable by single target damage. you can hover over them in an extremely precise spot under the monster and it shows you have said monster highlighted but you are still unable to deal any damage. The only way these enemies can be killed at this point is by doing certain AoE spells. This has happened to me quite a few times throughout the cave. It is only a mild annoyance b/c there is a work around still an annoyance. Overall this game has been wonderfull and I'm happy to finally see its full release.