Playback glitch -

Hey, just had a glitch happen. I swapped over from one project to another, and one frame from the timeline (Not anywhere near where my playhead was at) got stuck on the playback screen. No other videos would replace it (The right audio was playing, though), whether in edit or cut, whether newly introduced to the bin or an existing file in an old project's bin, and even whether it was a video or photo file. Mousing over the photo file in the bin would play the action in that single frame from the video file in the previous project. Playing through the timeline would result in the correct audio playing underneath the single frame spasmodically repeating over and over.

Luckily, closing the program and restarting fixed the issue.