Seems like chrome has a issue with autostarting an exported patch where the webaudio api is used : https://developers.google.com/web/updates/2017/09/autoplay-policy-changes
So far an user interaction is needed before the start of the patch.
This is an issue for many other patches here I see here as example , too.
As I replaced the autostart at the onload event in the exported index.html of a patch with a button onload it worked fine in chrome.
Maybe it would make sense to add a request at onload to check for this policy - and present a button if active ?