I think I may have solve this problem. At least on my phone. On the suggestion of my nephew, who's a tech wizard, I downloaded the Google keyboard from the play store. I switched over to that as defalt instead of the Samsung keyboard. I have NOT been able to duplicate any of the errors I was getting before. Problem solved. At least on my phone, and my wife's. Bonus being, I find I like Google's keyboard way better than Samsung's. Give it a try. See if it works for you.
Below is my previous post when I first start experiencing these problems:
I've been getting an error when typing in evernote.
Say I type a word, and miss a letter. If I put the cursor in the middle of that word to try to add or correct it. It adds extra letters.
I've uninstalled and reinstalled Evernote. I even have a new phone now, and It still does it. I just recently tried it on my wife's phone. Her's does the same thing. is anyone else getting this?
My current evernote version is 8.6.1
This happens on my Samsung note 9, my old Samsung S9 edge, and my wife's Samsung S9
Tist (say I mistyped test)
TTest ( If I place the curser after the i, backspace then added an e, it adds an extra T)
Tech (say I mistyped teach)
TeTeach ( If I place curser after the e to add an a. It added Te...)
Wandiring (say I mistyped wandering)
WandWandering ( I placed the curser after the i to add an e. It added Wand... )