KeyframeEffect::propertyAffectingKeyframeResolutionDidChange performs a switch on m_blendingKeyframesSource but this one is no longer valid if the animation changed.
Pull request: https://github.com/WebKit/WebKit/pull/5163
Committed 255308@main (fa25b1316fbd): <https://commits.webkit.org/255308@main> Reviewed commits have been landed. Closing PR #5163 and removing active labels.
<rdar://problem/100925928>