See rdar://111698053 and rdar://108126462 and rdar://113007909. This may or may not be specific to any specific decoder, but given the fact that the same symptoms happen with both AVIF and JPEG XL, it's likely a single cause for all decoders.
<rdar://problem/113013038>
Committed 266408@main (4ef6f54430f8): <https://commits.webkit.org/266408@main> Reviewed commits have been landed. Closing PR #16170 and removing active labels.
I think EWS got confused…
This got landed in the private security area.