Multiple bluetooth keyboards have problem with same key
I have a first gen iPad Pro, and have used a Logitech keyboard case for it for years. Just a few weeks ago the apostrophe key stopped working, so I ordered a new Logitech keyboard case. I used it successfully for a few days, but now the same key has stopped working! In some applications I can still get quotation marks with the shift key, but the apostrophe does not work anywhere. However it DOES work when I use the on screen keyboard.
Could this be a problem with the iPad, since it has followed me from one keyboard to another? How would I go about troubleshooting? iPad software is up to date, running iPadOS 13.4.1, and otherwise I have had no problems with the magnetic connector on either of the keyboards.
iPad Pro 12.9-inch Wi-Fi