This is a visual bug with Pyre Golem. I have not tested to see if it also applies to other golem types.
The golems will randomly lose their location visually. I know that the game still recognizes where they are visually supposed to be, because I can see their fire aura, but the golem visual seems to be offset by a certain amount from the center, resulting in the graphic display for the golem rotating from the centerpoint far away from where it is supposed to be. The golem will appear to be going through walls, and glitching all over the screen, even though you can tell the game is still calculating where the golem is supposed to be correctly, as they still appear to be attacking and casting, and the attacks and casts still count.
It’s SUPER distracting, though, and I find myself constantly recasting the skill to try to get rid of it.
Of note, I’m using the Aaron’s Will item, so I have 3 Pyre Golems at the moment. Sometimes I will have all 3 golems glitching and teleporting around. I am also using the Skele Mage teleport skill, but it does not seem to have anything to do with it (I used transplant instead for a bit, and it made no difference) so it doesn’t seem to have anything to do with my own location changes. Some levels also seem to be far worse for it than others, particularly in monoliths, but it does happen on all maps I’ve done so far.
Can’t post a screenshot, sorry, because I can’t upload JPG files. I hope I explained that okay.