DIAGNOSIS The capacitive touch buttons have no physical travel or tactile feedback. Accidental activation is common, especially when handling the monitor or if it's placed near other objects.
FIX Develop a specific handling technique. Always pick up the monitor by the top and bottom bezels, avoiding the right-side edge where the buttons are located. When placing it in a bag, ensure the right side is not pressed against a book or charger. There is no software setting to disable or lock the buttons.
IF THAT DIDN'T WORK The issue may be exacerbated by a screen protector or case that applies slight pressure to the bezel near the buttons. Remove any third-party accessories and see if the phantom presses stop.
HEADS UP The power button is also capacitive. A long press (about 5 seconds) is required to turn the monitor off. Brief accidental touches will not power it down, but they will wake it from sleep or open the OSD menu.