Snakepit Pearl Ring Bug? POE2

So, I am currently running a frostbolt build using snakepit for the unique ability "Projectiles cannot pierce". The problem is the projectiles sometimes pierce and sometimes they don't but most frustratingly the projectiles don't even explode they literally just bounce off the monster when it does hit and only explodes when it hits actual terrain or frost wall etc. Is this the actual intent of this unique or is something wrong with i.e. bugged? I have xbox video clip but don't know how or where to upload to show the problem.

I'm having a similar issue except for the bouncing. My frost bolts pierce right through. This has a huge impact on the amount of damage the attack does to a boss.

Something about the ring or the effect is bugged. I've tried it with Frostbolt as well, and the behavior is weird. It will sometimes explode on hit at certain distances, but then it won't at other random distances. It's so strange and inconsistent.