Lyrics always appear in incorrect font size

This is a long term issue for me that I am finding extremely frustrating.
I go into the score settings window, click on the Text tab, click on the lyrics tab and then enter size 12 font, not bold. I click Apply.
I then click under the note on the score that I want the lyric to appear under. I start typing. Instantly it reverts to size 18, bold, meaning that all the syllables clash with each other and are totally illegible.
I want to be able to type from the outset in the correct font size, not have to stop typing after each syllable in order to change it.
Please could someone help me!