Found in Version:
8/26/2019 (09:30) TR_LakeAndaram_v.0036.esp 8/25/2019 (23:36) Bas T_Mw_FloraSH_Tanna02d Thirr Valley Region (6,-42) 54410 -340218 1186 "Collision sometimes traps the player, since it's not that big add a no-col property and delete collision?"
Looking at the model it has no collision set up at all. Just add a NiStringExtraData (no plural), Value NCO, Bytes 7. Or copy/paste from vanilla plant.