focused view fails in safari

Hey,
I have implemented focused view in my application and it works when i use chrome,
but when i use safari it fails and I get’s stuck in an endless loop of loading.

this is the message i’m getting: 
```
Refused to load https://demo.docusign.net/Signing-*********insession=1&ti=3c31d6822d2******fc4 because it does not appear in the frame-ancestors directive of the Content Security Policy.
```

important to note that: 
the frame-ancestors directive also includes the domain from which i’m running the code.


in addition i get this errors too:
1:
```
Error while parsing the 'sandbox' attribute: 'allow-downloads' is an invalid sandbox flag.
```
2:
```
https://apps.dev.docusign.net/cdn/integration/1ds/widgets/@embedded/signing-ui/*****/js/1ds-bundle.js.map
[Error] Failed to load resource: the server responded with a status of 403 () (1ds-bundle.js.map, line 0)
```
and a few more...

will appreciate any data about why it happened and how to solve it.