Ya, Exact same thing happens when using shortcut keys to zoom.
Reproduce: Control+Shift+Up until upper track goes above arrange view top, then + key to zoom horizonatally, this causes track1 item to be seen and vu meters get drawn below tracks, then moving mouse over tcp draws stuff on screen.
Seems as soon as I do something that causes the tcp to redraw its back to normal.
EDIT
Also did a clean 0817 portable install and it has same problem, when using horizontal zoom the ui first scrolls down a bit (Bug!) and my guess is,.. what you see in TCP is not what you get,
because TCP is not getting redrawn?
Win10 x64