After the Chrome window changes size due to creation/changing maximized state, on Windows, the right edge is very difficult to resize.  There's about a 1 px-wide region that produces a resize gripper, when there should be something like 8 or 16 px (I forget).

The corners can be resized, and once you do that, the right side seems to give a correct gripper region.

I don't know when this regressed.

->bsep as a nominal frame owner to try to triage/bisect.