When you say “hang”, do you mean it changes partially instead of all the way? This could be due to the datewheel being too thick at some parts, a common issue with the 4302 clone issue on the 15500
Could be ...
... But when I tried to document the error just now, another - this time serious - error appeared - the minute hand no longer seems to sit properly on the Canon pinion (sorry for the perhaps wrong technical term, I'm more of a layman).
I hope @Nikz19 can fix this ;-)
As I said, the second APS (in blue) does not seem to have any quirks. So either I got a "Lemon" or APS has quality problems with the clone movement. I would guess the latter and advise against buying it for the time being.