Wacom Intuos Pro & Lightroom: Right "click" randomly stops working

I'm hoping I can get some help here...this is driving me nuts. 

After working in LR Classic for some amount of time, it never fails, at some point, my pen (or tapping with touch) stops registering.  Touch still works, in that I can move the pointer around via the tablet, but tapping with touch or the pen to select ceases to work.  I can often log out & back in and it will work once for a short time, before it completely stops working without a computer restart and/or shutdown.  Once it stops working, it doesn't work for anything (i.e., touch/tap ceases to register in any program, etc.).

I've deleted and reinstalled LR, I've restarted, etc. the Wacom driver.  My table is a bit over a year old (after I bought a new Intuos Pro M to replace my older one that was really causing random problems).  I have 2 pens and tried them both in case that was an issue (although obviously not, as the touch-tap also doesn't work).  Does this sound like any familiar issue to anyone, or any ideas to help?  Considering this *only* happens when I'm working in LR, it feels like this must be some issue between the two.  Thanks for any help or ideas!