I not sure it happened after update but my DJI Fly app does not remember "phone charging" setting
It is always off
Im putting it on, disabling the drone with a button and after next reconnection this setting is always turned off
How about you?

Is this on a iOS phone?  Using an android device mine always stays turned on.

Yes iOS, what more if i change the setting to ON again and turn off the drone it is still charging.
I think it was stoping charging before after disabling the app but i may be wrong