I started using the Windows 10 app and wrote some entries so far.
I suddenly noticed that when I go to the start of a line with text and start typing, every new character I type deletes the the character that was after the cursor, and basically overrides the text that was in that line in the first place.
After restarting the app this stopped.
Before this happened I messed with hotkeys and tried pressing Ctrl + Different keys.
Recorded a video as well: