We tested on macOS 15.5/Safari 18.5 and the issue is resolved. Thanks for the fix!

Verified this is still an issue in macOS 18.5 / Safari 18.5 (20621.2.5.11.8)

Sorry, that's macOS 15.5

Verified this is still an issue in macOS 15.6 and macOS 26 public beta

@Systems Engineer any progress on this issue?