On hud mode, it is still misaligned, the text should always appear within the text box of the menu. At this moment it appears in the upper left corner (where the channel title bar is) which is completely incorrect. It should fill from top to bottom (as every other one does) and then "start" at the bottom of the text box pushing the input up.
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As you can see the most recent message appears at the top left of the menu, and any older messages get pushed to the top.
Let it looks like on hud + full, where the latest message appears on the same spot where your latest message appears in an open chat menu.
a few more pictures to clarify
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