Fast fix. There seems to be a difference in handling between zlib and Apple Compression
<rdar://problem/106003684>
Pull request: https://github.com/WebKit/WebKit/pull/10768
Committed 260923@main (fe58e5cd0281): <https://commits.webkit.org/260923@main> Reviewed commits have been landed. Closing PR #10768 and removing active labels.