I'm having the same issue as this person references in the link below with V. 22.3 when syncing a separate audio file to a video file. I did not use any markers and the program would bring up the spinning wheel and crash when I tried playing it back in the timeline. I thought it was a codec issue and exported the clip in ProRes but it didn't solve the problem. The only way I could play back the video was to unlink the attached audio and cut the audio file and video file separately and line them up manually.

https://community.adobe.com/t5/premiere-pro-discussions/22-3-freezing-trigger-identified-markers-left-on-clips-before-merging/td-p/12894176