While trying to edit long video on my iPad Pro 11, the preview window often freezes and and nothing renders no matter how long I wait. My only fix for this at the moment is to use the readjustment slider which forces a rerender of the preview window. I've seen on the Adobe Rush support page that rendering may fail at times due to low battery. I've tried this at low battery, 100% battery, and 100% battery while plugged in and nothing fixes it. I've tried deleting the project and redownloading it, no fix. I've also tried reinstalling the app, still not a fix.
EDIT: I’ve discovered the issue only occurs when the device is in landscape mode.