Hi!
Opening any web-based QuickLook AR experience (e.g. https://developer.apple.com/augmented-reality/quick-look/) in an app that launches an In-App Browser (e.g. Slack, Discord) will result in only the "Object" tab being visible, the AR mode never loads despite the USDZ object loading just fine in the Object tab.
This is a breaking change from iOS 14 & one that I depend on.