I’ve also found that clicking once in the text box after adjusting the font size prevents this happening. It’s only obvious when there’s a significant font size change, so smaller adjustments could go unnoticed!
I’ve found that this issue happens differently depending on how you input a font size value.
Manual input in the font size box, and then selecting a second text box, it happens immediately.
Using the ± buttons to change the font size, and then selecting a second text box, the text appears unchanged, however, the font size field reflects the adjustment.
If you then use the ± buttons on the second box, the change is registered. You can only prevent this by deselecting the box or manually entering a new value.
This same issue is also affecting the border thickness for “Dynamic Shapes,” for both lines and shapes.