Upgraded Big Sur to 11.2 and now Lightroom adjustment brush cursor does not move unless I touch down

This is not good. Now I cannot get the adjustment brush cursor to move unless I first 'touch down' onto the image which then starts adjustment brush working in a place I do not want it to be. I have to do this if I want to be able to move the adjustment brush cursor to an area I want to work on. I press very lightly so I don't cause too much damage before I can move the cursor to the area I actually want to work on. I do not want to downgrade my OS, is that some way to work around this, or did it happen due to some other reason but started when I upgraded the OS? Would love to get it back to working normally... I've tried resetting preferences and I've checked the flow and density settings, have done quite a bit of fiddling with and looking at menus before posting here... I'm at a loss...

Any ideas for fix are greatly appreciated,

Ken

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