Chrome Version       : 70.0.3538.77
OS Version: OS X 10.13.6
URLs (if applicable) : example at https://jsbin.com/vibulebeqe/edit?html,output
Other browsers tested:
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari: FAIL
    Firefox: OK
    IE/Edge: did not try

What steps will reproduce the problem?
1. Open the jsbin provided
2. open devtools and delete all cookies under spireon.com domain
3. edit the jsbin to force a refresh (change iframe src to another domain and back to spireon.com"

What is the expected result?
When the spireon website is loaded in the iframe, the cookies for spireon.com will update in the devtools.

What happens instead of that?
The cookies stay blank for spireon.com in the devtools.  If I close the devtools and launch them again, I am able to see the cookies for spireon.com.


Please provide any additional information below. Attach a screenshot if
possible.

In case you are unable to access the jsbin, it is simply the iframe:
  <iframe src="https://www.spireon.com" />
There is nothing special about this, except that it of course needs to be a site that allows itself to be displayed in an iframe.


UserAgentString: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36