We added support for blending the `opacity` property with threaded animation resolution enabled with bug 268738. However, we would set the blended opacity regardless of whether the effect stack targets that property. We should only set blended properties if relevant.
Pull request: https://github.com/WebKit/WebKit/pull/24213
Committed 274478@main (4f259dc1446e): <https://commits.webkit.org/274478@main> Reviewed commits have been landed. Closing PR #24213 and removing active labels.
<rdar://problem/122822652>