When trying to make a webrtc call via 15.1 on iOS we are seeing tab crashes when H264 codec is getting used. Its easily reproducible with https://js.samples.s4d.io/browser-single-party-call/ Its similar to https://bugs.webkit.org/show_bug.cgi?id=232381
Here is a live Url to test https://instant.webex.com/hc/v1/talk/alpha?org=eb370c0f-0f4b-42e9-bb89-66671b15ae52&int=epic&v=1&data=BKNB+3oWQS3yhNczHZ37aTLtHWw7WX/yUhwii7zG1QlERJGOaqo+2+TFTOZJ/0bNKBwizm1Rf6YP4D7Hwv4oyZC7uY5r7yGkAZEP3OXgV3bHWiE97TXL/pj1QBV/qeJPBkJ4KUrUGmIb0sAjcPtkzA==
*** This bug has been marked as a duplicate of bug 231505 ***