Vertical scroll with mouse wheel in horizontal scroller fails to propagate to the document
Created attachment 435115 [details] Patch
<rdar://problem/81640239>
The test failure is real, but only occurs with async overflow scrolling disabled.
Created attachment 435207 [details] Patch
Committed r280807 (240377@main): <https://commits.webkit.org/240377@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 435207 [details].
*** Bug 229390 has been marked as a duplicate of this bug. ***