The tick ran the OnUpdate walk without resolving the layout around it, so a resize made in an event handler fired `OnSizeChanged` after the walk, and some walk slots resolved on their own to compensate. Separately, `OnSizeChanged` gated on 2⁻²² in benilla's units, and an emptied FontString kept its old measured box in the incremental layout.
In the reference, the pump drains the layout queue before the walk and again after it, each drain firing `OnSizeChanged`, then re-picks the hover. ApplyRect compares sizes against 2⁻²² in its own units, where the screen diagonal is 1.
The tick now drains before and after the walk and drops the stand-in resolves. Size gates scale 2⁻²² by the layout unit, and a FontString's text going empty or back names it on the layout when its node changes.
Tests pin each.
Fixes#912Fixes#741Fixes#914Fixes#911
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
