In-game Enemy body frame glitching

I was using the training tool, every time I chose an enemy target or just pause my cursor on it to view its information (towers, camp mobs, minions and heroes)

Their body start flashing, some parts of the models went missing, look like they are experiencing some kind of genetic reformation or sth, but when I move away the cursor, their models get back to normal again. its kind of disturbing especially when you attacking a turret or baron or anything large, as long as its chosen as a target, it will keep flashing until you unselect it or move the cursor away.