Small GUI Text Invisible in the Game View

I am trying to simulate a ticker display animation with sliding GUI text (GUI TMP with a panel as a parent masking object).

The problem is that when I scale my ticker display prefab really small, the GUI text becomes invisible in the game view although I can still see it's animating in my scene view. (Screenshot attached).

I suspect it's somet$$anonymous$$ng to do with a camera or a canvas setup, but not hope. Anyone had a similar problem or any guess? Please let me know. Thanks!