P: Update Publish Collection Stalls

Same isuue when publishing to Flickr.  

Thanks for posting this. I was beginning to lose my mind. 🙂

For what it's worth, this happens to me when I publish to my PhotoShelter account with Photoshelter's plugin, my WordPress website via WP/LR Sync, Flickr etc. as well — it doesn't appear to be limited to on-disk Publish Collections.

I'm seeing this too, using the SmugMug plugin which uses a Publish.  However, it appears to only happen when I apply the "Resize to Fit" option.  When I turned that off, I saw no problems.  (SmugMug Help pointed me at that.)  My experience also matches Rikk's: simply moving to another collection unsticks things too.   For now, I have reverted to 11.1.

I had the same upload problems last night on my iMac intel.  I finally figured that by quiting Lr and reopening it would load a few more files.  This morning it is not advancing to the next photo for editing except in the Navigator and my secondary monitor. I'm seeing a spinning gear in the toolbar beneath the preview and it never resolves.  If there is not a fix soon I will be back here to get some advice on how to go back to the previous version of Lr. 

PS: if you switch back to version 11.1 everything works again (for me most important was Pixieset - there I can upload now without any problems...).

(MacOS BigSure 11.6)

Same here. Only one photo gets uploaded on pixieset and the rest stopps... 😕😕

I'm having this problem too. (MacBook i7, Monterey 12.2.1)
Rolling back to 11.1 is working so far.

Also had to force quit a backup once, and then (re-)optimize the catalog

I have the same problem. In addition, LR will no longer perform backups. The progress bar looks like this, and I can wait all night with nothing more happening. I have to force quit every time. 

Not sure if this helps anyone else but I've found that after clicking on publish (I was uploading to Flickr) if I simply click on another folder in Lightroom, I've had no more hangs.

Great news, thanks for cranking!