Some issues with player / npc getting stuck

#1

Rare NPC gets stuck in pillar and is no longer aggro or targetable.

Where: abandoned prison. pillar near first waypoint



https://postimg.cc/bZNY79jb

#2

Where: molten vault.

when: upon beating boss

what: player character is frozen. I can interact with my inventory, but not move or loot. I see boss loot and quest item.

I respawn to last checkpoint and can go and gather the quest item, which is now where the boss spawns rather than where he died. The loot is gone.

Sorry no screenshot(s) for #2.