Thank you but no more need to. I encountered it today after I had edited an automask, duplicated and inverted it, on a linear DNG exported from a stacking tool using RAW files - it felt like minutes.
Generally I edit the shots in PL and then stack. Today I was “inspired” by all the pain spoken of in relation to DNG here an thought I’d give it a go.
MAC users are reverting back to 7.1.0 (which also happens to be the latest version number for Windows on which I encountered the issue). 7.1.0 is the only one I have for Windows so I can’t try if an earlier version is better.
Also see here: "Correction Review" Keeps Sticking - #14 by User_Number_777
I am able to make it a bit slower with enough other local adjustments, but edited automasks make it really bad (It was worst with the DNG.)