Thanks for reporting that,
I tried opening your Run login page on iOS (Safari and Egde) and it worked correctly. Is this happening on multiple iOS devices? I suggest you check if there’s any autoplay function deactivated on your browser or any kind of configuration to reduce data usage in your iPhone or browser.
For now, the workaround would be using another browser. Your report is now on our roadmap, soon our team will analyze it to identify the problem.
Hope it helps, if you need further assistance, let us know, we’ll be glad to help you.