LR Classic mask panel disappears
Every now and then, the mask panel disappears. To get it back, I have to quit and restart LR (vs 11.2). I'm on a 2017 27" iMac, running OS Catalina 10.15.7 with 64 GB RAM (Radeon Pro 580 8 GB), but this happened when I had upgraded to Monterey, too — one of the reasons I went back to Catalina.
I usually don't restart my Mac for several days and LR is usually open the whole time. I had not used any masks for two days. Yesterday, I went through 2600 images without Keywords, remedied that, then put the Mac to Sleep for the night. When I tapped the spacebar to wake it in the morning, the LR window popped up in the Library window. I enlarged a few images, marked a few with ‘x’ to delete later, selected one and pressed ‘d’ to develop it. I clicked the Auto button, then the mask icon. The mask list opened and I chose Select Sky, which it did, however, the Mask box was not there (top screenshot). I quit LR and restarted and now the Mask window showed up (collapsed version which may be a key — second screenshot).


This has happened to me quite often; I use all 3 views of the mask panel, even trying it docked in the right panel, but I'm not sure if that made a difference. I was with someone recently who was projecting his computer screen onto a larger screen and it happened to him, so I know it’s not just me.
Please figure out what's going on. I use Masks a lot and can't keep restarting LR or my computer because the mask panel isn't showing. Thanks.
