→Screen synchronization issue on 120 Hz screens
One would expect ''picture1'' to be shown for 1 frame (1/120 s) and time ''dt'' to show this. Sometimes this is not the case. The image will be shown for one frame (1/120 s), but ''dt'' will be 2/120 s:
The fact that ''picture1'' is shown for only 1/120 s was confirmed with a light sensor connected to an oscilloscope.
The chance of this issue occurring is highly dependant on the waiting time