[Mobile Beta] Editing Text with Grammarly Kaeyboard

I'm probably in the minority, but I thought I'd report the issue in case it affects others, too. Updating the text using the Grammarly keyboard doesn't seem to work. Instead of typing the entire word, I only get one letter at a time. Replacing the line of text by highlighting it first and type doesn't work either. My default Samsung keyboard doesn't have this problem.