I notices that in auti-exposure video shooting mode (4K/50fps in my case) ISO is too high
There is plenty of room in terms of shutter spead for 50 FPS so why not to use 100 ISO (less noise!) and slower shutter? It looks like a firmware bug to me. Hi DJI will you fix it ASAP please.
PS I just checked my Osmo Pocket and found it working as expected i.e. chosing lowest ISO necessary to shoot in certain lighting conditions.