Vertical Footage Distorted When imported from Iphone XR

Video that was shot vertically on iphone appears like the above in premiere. Video that was shot horizontally appears normally. Right when I import this vertical video, it appears normally in premiere, but within a few minutes it snaps back to this distorted view for some reason. There is very little I have been able to find about this problem. Apparently transcoding the video is a possible solution, but is there a way to do this within premiere? I'm not sure why simple vertical video shot on iphone XR would appear distorted like this with no obvious fix.
