We are displaying e-document in iFrame. On Safari, there was a known cookie issue described in https://developer.esignlive.com/forums/topic/cookie-issues-on-safari/ . We are ok with it as long as it shows description and guideline to the client. However we found that it only happens on the mobile version. On desktop version it just shows a blank page.
After a quick test, the inconsistent behavior still remains. I can create a support ticket on your behalf and let’s see when it can be fixed.
At the meantime, few potential solutions solving the cookie issue on Safari has been raised, I will also let you know when any workaround is officially recommended to use.