I've done a bit of troubleshooting with support and this hack helps for me:
Open Evernote on your Android device > click on the three horizontal lines in the bottom left > click on the gear icon > click on notes > activate the edit protection (double tap in the note to edit)
On my device this works now 99% of the time, so it's not perfect. But it makes EN usable on the tablet again until they figure out the bug.
I hope it works for you!