The hamburger bars move through a 150ms CSS transition (clamped only under
Reduced motion). The test read the closed computed style immediately after an
Escape, which could land inside the close transition and capture the open
values; reopening then produced an identical read and the morph assertion
failed intermittently depending on the suite account's motion preference.
Capture the closed style while the bar is at rest before any toggle, and poll
the open style instead of sampling once. The assertion still proves the bar
moves between the closed and open states.
Anso
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