QHY600 - Changing Mode on the fly

I read somewhere that if you change the Mode on a QHY600 (and perhaps other cameras), that the mode doesn’t come into effect until the camera is rebooted.

Firstly, I don’t know whether this is true and secondly I don’t know how to test it?

So, if I change the mode in SGP in the driver it instantly shows the new mode and it is saved. But is the camera now using that mode or does it only use it after a reboot?