While aiming at any block or certain items such as levers or buttons with touch controls (Both original and updated UI), the aim is off and the highlight/outline for the block being aimed at is another nearby block instead of the one you're truly aiming at. This seems to not matter on distance but is far more noticeable from further away blocks. It becomes a real issue when it comes to interacting with crafting based blocks or command blocks for examples as you half to aim more to get it to aim where you want.