P: Lightroom on the Web (iOS Safari): HDR photos display as SDR in Play Slideshow

In Safari on iOS 26.3.1, HDR photos display as SDR when Lightroom on the Web is in Play Slideshow mode. HDR photos otherwise display correctly as HDR when clicked upon for single-image display.

Behavior is identical whether or not user is logged in to Lightroom or anonymous (i.e., sharing link).