All keyboard/mouse controls appear to be delayed. I measured this to be roughly 200ms on average, with a max of 350ms. This is very noticeable, especially when trying to do something like tricky parkour, combat, or quickly reorganize your inventory.

Affects both singleplayer and multiplayer. Appears to apply to controls both in GUIs and in-game. In-game looking/mouse movement is also affected

Below is a video showing how I recorded the game (at 60FPS), then went through in VLC frame by frame to measure how long it took from QIPress picking up the button press to the game picking up the button press.

All Win10E players I have spoken with have noticed this delay. Additionally, the video shows the same test in Java and no delay is seen, which I think should rule out hardware or OS issues. The game runs smoothly and without performance issues other than this delay.