9.7" iPad Pro BT Keyboard (ALL OF THEM) connectivity issue

Hi Apple-ites,

iPad Pro 9.7, iOS 11.2.5

Had a Logitech softkey bluetooth keyboard that worked reasonably well (despite the hated texture) for my purposes (grading, teaching, etc...). After the November 16, 2017 11.1.2 update I began having connectivity issues with the keyboard.

Turn it on, it would connect, but keystrokes would not register on ipad. Did all the steps (turn off BT, turn it back on; forget the device, re-pair it; reboot ipad and repeat all steps above; make sure keyboard fully charged, then repeat all above). I let it go, thinking an update would fix it.

Nope.

Did all subsequent updates, each time hoping for a fix. Began to think it was a hardware issue. Pulled unused Apple Smartkey keyboard out and tried that. Same issue. Would connect, would work, then would not. It's never shown in the BT connections window, so I couldn't un pair and then re pair.

Did the InterYaGoogly search to discover that Apple extended their warranty on the original Smartkey boards, so went to Apple Tuesday and got a new one. Worked for half a day. Now we're back to the original issue, though now I have nothing to pair/re pair/forget, etc.

Super frustrating.

Anyone else have this and find a fix? I've searched the forums, the Webz, the skies. I'm stumped (and irritated).

Thanks,

Polly