I don’t think this is a bug. At least it doesn’t feel like one too me.
I consider it more of a feature. Adds a certain danger to using the forge, and a unique mechanic for killing the adds in front of the forge by pulling them towards you… after jumping over the lava trap
Maybe if they add a few burning skeletons decoration over the grate… people will consider that a warning.
If there needs to be a risk element or a challenge element here, I accept that. However - there would need to be an accompanying visual (or audio) queue that would clue in the player to some danger. If the floor were to vent or buckle at the kill spot, or perhaps spray steam, perhaps? I would be good with that. But as the floor has been, you just have to “know” where the kill spot collisions are. Death in the Well is pretty harsh - I don’t think you have the ability to set a bedroll anywhere nearby…
I am sure that the player spying me approaching the forge would likely laugh their ■■■ off. I have taken to a sort of super mario routine when approaching the forge. I hop over a spot to a known / trustworthy patch of ground. Then I climb up and around like a spider, uneasy and wary of all of the floor around the forge, and the grate itself.
Worst part is that I will never trust that flooring again, even if they were to go in and fix it. So, even if they correct it (or add the appropriate visual hints that you will die here), I will always stick to the routine that I have worked out. As silly as I am sure it looks.