In the case where a filter value animates from or to "none", we fail to correctly run the accumulation and clamping code.
Pull request: https://github.com/WebKit/WebKit/pull/6762
Committed 256976@main (85de8f728bd8): <https://commits.webkit.org/256976@main> Reviewed commits have been landed. Closing PR #6762 and removing active labels.
<rdar://problem/102630286>