It started to happen after a certain update at summer or autumn 2023, and I think only in QT6 variant.
When reviewing the next card and pressing Space to reveal it, Anki sometimes displays data from previously revealed card instead of the current card. At first I was just skipping them and returning to them with Ctrl+Z which worked. Later I found that simply by changing web page render slightly by zooming in/out with mouse also solved the issue without the need to skip and return to the card.
I didn’t have the time to report the issue and actually hoped it would be fixed quickly because there is no way I’m the only one with this annoying issue. But here we are, it’s still happens in the latest version.