Probably it's because some styles were applied in the text editor that don't get overwritten by the mouse over CSS.
Can you please go to Customize > Links and texts > Links and texts mouse over.
[image: 1747071149346-screenshot-2025-05-12-at-19.32.24.png]
Then please activate this setting for mouse over styles.
Currently, this reads "force mouseover color".
But with the next update I'm changing this to force apply all of the mouse over styles, not just the color one. Because I think that makes more sense.