Lightroom Classic 13.5 drag and drop stops working

[h4nc0]

In LC 13.5, I am dragging multiple files into Collections.  After dragging for a while (hundreds of photos), I can't drag photos anymore.  Everything else works fine but dragging photos stops working.  Any idea?

Thanks!

[John R Ellis]

First troubleshooting steps:

1. Make sure that you are dragging from the center of the thumbnails, not from the grey borders around them. It's a long-time design misfeature that still trips me up about once a year.

2. Restart your computer.

3. Are you trying to drag into a smart collection or a collection set (a folder of collections)?  You can only drag into regular collections and folders, not smart collections or collection sets.

4. If none of this helps, try resetting LR's preferences:
https://www.lightroomqueen.com/articles-page/how-do-i-reset-lightrooms-preferences/

LR sometimes soils its preferences file, and resetting it can fix all sorts of wonky behavior. That article explains how to restore the old preferences if resetting doesn't help.

[h4nc0]

Hello

1. Yes I am dragging from the center.  Dragging completely stops working when this happens.

2. Restarting Lightroom Classic fixes it but happens again after drag and dropping a lot of files again.  This is completely "reproducible."

3. I am dragging into Collections.  Like I said, it works then stops working.  

4. I will try this.

Thanks.