Capsule trace performance issues (mobile platform)

This is Android / Gear VR project.

Basically when I look up where trace hits nothing, performance is good (considering that video capture chugs fps). Tracing far away from player is pretty good too. However, as I look closer and closer to player’s location (trace hits closer to player), performance degrades and at some point it drops to minimum (yellow fps counter).

I am using capsule trace (so that player can’t teleport where it will get stuck).

This issue doesn’t seem to appear in PIE.

I also don’t recall having this issue with 4.11.2 (currently using 4.12.4)

Any thoughts ?

Thanks beforehand