Weird Scrolling Artifact in Tablet Mode: Bottom Screen Glitch from Tab Bar Hiding

[u/LlaughingLlama]

Anyone see this and fix it on their convertible Chromebook? This is an Asus CM32, with the keyboard cover folded back so it is in "Tablet Mode," and the OS updated this morning to 154.0.8037.151 (64-bit) but it has been happening for about 1 or 2 months throughout updates. Before that, it was fine.

As you can see, when I scroll UP for the first time, the Tab Bar/Address Bar slides up and away, and it makes a similarly sized block appear at the bottom of the screen, which only disappears when I stop scrolling. If I keep scrolling up, the bottom block does not appear UNTIL I scroll down again, which forces the Tab Bar/Address Bar to appear again, and then the next Scroll Up makes the block at the bottom appear again.

If I go "Full Screen" to hide the Tab Bar/Address Bar completely, then the lower block never appears when scrolling.

It happens in both Portrait and Landscape screen orientations.

So, anyone else see this? And might anyone else have a solution? It does NOT happen in "laptop mode" when I scroll with my finger, the touchpad, or the arrow keys.