I'm on the 2018 Home and Student Edition, and have had this installed for some time. Suddenly, when I type in the numeral 5, it shows as 5 until i click away from it, then it changes to 17. I can't find anything helpful by Googling - any ideas?
I've tried six fonts and it is the same in all of them. Only the numeral 5 does this. I've checked what happens in Word, and it's fine there.