That seems likely then! There are a few places you can look.
A. On the blank study screen, if you try to select text on the card (double-click, or click-drag), is there anything there?
B. From the blank study screen, click “Browse” to see the note editor and check the HTML view (click < > above the field) of the fields you’re expecting to see on this card. You’re looking for any unexpected formatting, especially related to color or size.
C. Then in the Browse window, click “Cards …” to see the card templates and styling that make this card from that note. In those, you’re also looking for formatting that would make things seem to disappear.