Full screen mode inconsistent between plain and rich text

Summary -

Plain text docs respect font size set in preferences for full screen mode but rich text documents do not.

Steps:

1 - In preferences -> editing, set font size for full screen mode to 18 pt and text size for both plain text and rich text to 12.
2 - create a plain text document - type and notice font size 12
3 - open in full screen mode - notice font size is bigger.
4 - convert document to rich text
5 - open in full screen mode - peer in despair at tiny font / reach for glasses or simply notice that font is still 12 point not 18.

Thanks for the feedback! Rich texts retain the formatting in fullscreen mode (and can be still formatted using shortcuts or the contextual menu), only the background/foreground color is currently changed.