Odd error on mobile safari? SecurityError: The operation is insecure

SecurityError: The operation is insecure.
  at None ([native code])
  at WrappedWebSocket (/:35:38)
  at WrappedWebSocket ([native code])
  at websocket (/a77dd17e94681cec51973bccb97184d7dca6942a.js:121:17720)
  at _try_next_protocol (/a77dd17e94681cec51973bccb97184d7dca6942a.js:121:16704)
...
(7 additional frame(s) were not displayed)

I keep seeing this come up in sentry… anyone stumbled on this one?

A couple other ones: