Me and a friend were doing our first run of Fiery Forge earlier today.

     At seemingly random points throughout the run, my controls would suddenly experience a sort of lag, though I lack a better word to describe the issue. Using mouse and keyboard controls, I was clicking to move as well as clicking and holding to control my movements. While this bug was happening, if I click to move, my character would move to the bottom right for a moment before moving to the location selected. Click and hold movement resulted in moving towards the bottom right regardless of cursor positioning. This results in walking into enemies you mean to avoid and a host of other problems caused by poor positioning. The person I was playing with, also Windows PC, saw my movement as stuttering during this.

      Seemingly during the same time, it was impossible to interact with items on the ground or doors. Clicking on loot or potions did nothing. Clicking on open doors resulted in just walking into the opening and not moving to the associated area. This also sometimes prevented me from selecting enemies to attack and prevented aiming with the corrupted beacon.