A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
Hello Mark,
Per the description shared, I understand the scenario and tested the behavior at my end using Stream Web Part, where I can reproduce a similar behavior as you explained. So, as a workaround instead of using the Stream Web part, use the Embed web part and you can get the Embed Link of Stream Channel via Open the Stream Channel> More actions (three dots beside the channel name)> Share> Embed> Select the Published Date as a Sort By> Copy the link.
Now go back to the SharePoint Online site, edit the page and use the Embed web part. Using the Embed web part will display like below:
In addition, I request you add your suggestion via submitting the feedback in the SharePoint · Community (microsoft.com) about the Stream web part.
Appreciate your understanding and stay safe!!
Best Regards,
Chitrahaas