P: Dialog for Export Settings gets trapped behind Photoshop windows

Same here.  Super slow rendering of ALL local adjustments, changing from Develop to Library Modules, and zooming in/out.  

Same here, crazy slow on high end rig (8700k + 1080ti + 1TB NVME + 16GB RAM), specially all local adjustments, switching modules and general GUI lag.

Not only raw processing is very slow, but also basic GUI functions like dragging a panel around, switching from one view to another, minimizing, etc.

Today it was so particularly slow for me that I had to record a video

Its so unusable at this point that I'm wondering if I should ask for a refund until they find a solution.

Sorry for the poor quality, I had to record with my phone as screen recorders wouldn't work with lightroom sucking up all computer resources.

I've just done an interesting test!

I got Lightroom 7.3 to make a pano from 10 vertical D800E images - this it did without too much of a sweat, and the result is a DNG at 33,300 pixels and 970Mb.

If I try to add even a graduated filter to this not-so-massive DNG then the Dev module crawls to a halt - just placing the filter takes nearly 2 minutes of spinning progress indicator.

However!

If I close Lightroom and open the DNG in ACR, then I can apply any adjustment I like and there is no slowing down of anything.

So why would ACR act normally and the Lr7.3 dev module act like it's been shot with a very big gun??

My experience: version 7.3 is now slow in zooming, generating 100% previews in develop. 16 mpixel image = two seconds..Mac pro classic 3.33, 12 core, Amd 3 Gb. 48 GB ram. Version 7.2 was instant zooming in develop

Thanks. It worked eventually. However, to get the option to roll back, I had to uninstall all versions of Lightroom CC. I reinstalled Adobe CC Desktop App and then found I had to log in with a different Adobe ID. Not sure how I ended up with two.

https://forums.adobe.com/thread/2476877

My experience incl videos. Unusable slow GUI overall. Compared with 7.2 in video.

Sorry, but if I click on the arrow to the right of "OPen" the only options are "View tutorials" and "Uninstall". The arrow to the left gives nothing.

In the Adobe CC app, you can find a menu listed beside the LR app when you click to expand it. There, it gives the option to roll back to previous versions.

Unfortunately yes. I had the machine running yesterday for 10-12 hours with LR open in the background. But honestly I did not notice, Lightroom was doing something during that time at all. How can I check if there are still background tasks ongoing?