The same has occurred to me also and even full stops are being missed, this is annoying when dealing with a lot of excerpts, cos it has to be corrected manually.
This bug occurs on the Ipad.
Thanks for the information provided. Some users have informed us of the same issue and we have recorded the problem in our tracking and managing archives.
The same thing is happening to me on my iPad Pro. I just upgraded to MarginNote 4 and was hoping it was corrected, but unfortunately, this error remains. It’s just very frustrating.