I don’t know whether this is a Dorico issue or a Windows issue. For the last two years, on my laptop I’ve had the dot on the full number pad assigned to add a dot in note input. It’s listed in key commands as “Num+.”
Today I went to input notes, and that keypress kept deleting the selected note. Puzzled, I checked Key Commands in Dorico… looked fine. So I deleted that key command, and re-added it… and that same key on my number pad now displayed in Dorico key commands as “Num+Del”
PS: I checked Num Lock.