To be slightly fair to Anthropic, Qwen does even worse IMO: their model announcements don’t actually show any content at all for me on Mobile Safari. The content box shows up but is just a pulsing animation that never gets replaced by text. At least Anthropic’s announcement works once I manage to scroll it far enough.
The fix for this is to tap the overflow menu icon and choose “Reduce privacy protections”. (Wtf, Alibaba?) This appears to be related to use of iCloud Private Relay.