Automatic emojis in text Undo Permanently

Hi,

Having emojis is definitely an asset, but can you please program is so that if I backspace an emoji it switches it back to the original text and it stays that way? D: to reference D drive is written very often and I have to either write out D drive or use copy-paste/other workarounds to prevent it from going back to being an emoji after backspacing it.

Thanks,

Mitch