Lightroom Classic Development Unit Not Working Properly

My process is to work on a photo in Lightroom Classic and then send it to Photoshop for further editing. After editing in PS I save it, which moves it back into LRC. Normally, the saved photo I just workedon is placed back in order within the catalog folder. This enables me to tab forward within the folder to get to the next photo for processing. However, now when I save the photo in PS and send it back into LRC the photo is sent to the end/bottom of the folder. When I go back to the library to access the next photo, I hit the Devolop button on top of the screen to send it for editing. The Develp module appears to open but the screen is blank. The photo isn't there, and there isn't anything I can do except close down LRC, reopen it, and start this whole ridiculous process over again.

I'm processing on a MacBook Pro running on OS Catalina 10.15.7 and I've updared both LRC and PS to the most recent releases. I tried to shut down my computer and restart to see if that would help. It doesn't.

I'm in a huge need for this to be resolved in a hurry. Please help!