I have the same problem on my Moto G5 phone. It is thought to be due to not enough processing power in the phone. Mine appears to start making the panorama, then hangs and goes back to the gallery screen.
Just tried today (Iphone8 IOS, latest version app, fw, etc).
Everything went ok, no crashes, panorama 360 completed to 100%, screen remained as normal.
Try, if you haven´t already, re-installing the app (Android), and resetting the Anafi to default values
(perhaps you already did after the latest fw update), if not, try resetting everything to stock,
after re-installing the app., then, try the pano once again.