[NeuroticPixels]

Ah, yes. I have the same issue, I think.
I have the font options, but the actual dropdown menu gets mostly hidden after I click my mouse in the message box to start typing. After I interact with the message box, it gets mostly hidden, but I can still interact with the drop-down arrow to select fonts.
I hope that makes sense.

Before interaction with message box:

After clicking to get ready to type: