While in the middle of editing, my adjustment brush will just stop working. I'll notice it doesn't seem to be doing anything, so I'll click on the "show selected mask overlay" option and no pink will show up. So basically the brush isn't doing anything to my photo. If I restart LR, it will start working again but I keep having to do this every couple photos and it's very annoying, considering I use this tool a lot! I have the latest version of LR.