Talking about those acid shooting things that are on paltforms/walls and shoot out green stuff every few seconds which also pushes stuff and damages you.
They are sometimes mounted on destructible platforms, and when destroying those platforms, the thing stays and just floats in the sky, which looks very weird and doesn't make sense.
The acid shooting thing should belong to the platform it's mounted on and if that platform disappears, the thing also gets destroyed.
Edit: attached image with the thing I mean. Didn’t bother playing a game to make an image of this bug, sorry