I'm not 100% sure if this is a bug but this troll has been spamming cave-ins even when nothing is blocking its path, the screenshot below shows what happened in 1 encounter.
With hitboxes
There was only 1 player at the time but it looks like he focused the cave-ins on 2 spots. It also happened a couple of time while baiting the troll through the tunnel
Has anyone experienced a similar issue before?