When I double click on my preview screen it goes black and I can't resize any videos on premiere pro

Hi everyone,

I'm having a problem resizing videos. The screen goes black without showing the resize handles when I try to adjust a video. The video itself plays fine in the preview, but this black screen issue only happens when I'm resizing. I can drag the video, but I can't see where to due to the black screen. It's only after I play the preview again that I realize the video has moved.

I've tried resetting the workspace, making sure 'Show Transform Controls' is selected, and restarting my PC. Any help would be appreciated.

Thanks!