As seen in https://github.com/WebKit/WebKit/pull/14092 The `bufferedchange` is fired twice as it should if the GPU process is disabled.
<rdar://problem/109586019>
Pull request: https://github.com/WebKit/WebKit/pull/14175
Committed 264467@main (dab28312bc80): <https://commits.webkit.org/264467@main> Reviewed commits have been landed. Closing PR #14175 and removing active labels.
*** Bug 254199 has been marked as a duplicate of this bug. ***