Small text during battle

Hi! There is something that heppend few times during my playtrough but mostly during Persephone’s battle and I wonder what does that mean.

As you can see, the text become very small for what seems no reason. The game get back to normal after the battle. Is is because the diablog is too long to stay inside the dialog box or is it something that can actually be fixed?

If your game doesnt have the necessary fonts, try to download them. I think that can reset the fonts.