Problems with Superscript

I’m having troubles with an inconsistency in the use of superscripts. I’m creating a mathematical course to help me remember formulas and for clarity i prefer the use of superscripts to (x^2) notation, however i’m finding that memrise is converting some of these superscripts into standard lettering, destroying the formatting of my cards. I’ve found no real pattern as to why this happens, some superscripts stay other will not even if the notation is same. Has anyone else encountered this issue, or know of any possible fixes?

I had the same issue for a moment, but then found that it can be solved by deleting the word and re-inputting it (if you’re concerned about order, you can rearrange words). The problem seems to be with the card and not the text itself.