Compact Flash Card Reader corrupts Compact Flash formatted with Fat

I have a Dell Precision 5810.  I recently reinstalled Windows 10 and have been having this issue ever since. For my work we use Compact Flash cards which must be formatted with plain Fat, and I use the built-in card reader.  I always "safely eject" the cards, but about 1/4 -1/3 of the time when plugging the cards into our Fanuc controller (CNC Machine) we get a "format error". 

So I will take it back to the computer and sure enough when I plug it back in Windows will say there is an error with the card and will repair the card, and it generally works after that until I load it on the computer again.  I've tried formatting the card(s) and that hasn't helped.  Any suggestions?