Text In text box deselect when clicking the Character panel. Unable to format text to different sizes within a text box

After Effects v: 25.6.4 (Build 3)
 

Text In text box deselects when clicking the Character panel.
Unable to format text or achieve different weights / sizes within a text box.

Example text in 1 Tex Boxt:
A sailor went to sea, sea, sea
To see what he could see, see, see
But all that he could see, see, see
Was the bottom of the deep blue sea, sea, sea!

I cannot accomplish this:
A sailor went to sea, sea, sea
To see what he could see, see, see
But all that he could see, see, see
Was the bottom of the deep blue sea, sea, sea!


Rather, I get this:
A sailor went to sea, sea, sea
To see what he could see, see, see
But all that he could see, see, see
Was the bottom of the deep blue sea, sea, sea!