[twiss]

The demo seems to work in Safari 17.3 on Browserstack even without the rule, what version are you using?

[jfk13]

Interesting - thanks. I'm on 17.1; time to apply a macOS update, I guess.

[twiss]

Interestingly it also seems to work fine on 16.5. Browserstack doesn't have 17.1, perhaps it was broken temporarily? Unless there's some other difference with the version of Browserstack somehow..

[torgoguys]

caniuse reports that a regression bug broke it in Safari 17.0 and 17.1: https://caniuse.com/colr