Safari mobile device debugger does not recognize multiple open iOS Simulator with Xcode 9

Originator:cjacob
Number:rdar://35643531 Date Originated:
Status:Open Resolved:
Product:Safari Product Version:Safari 11.0.1 (13604.3.5)
Classification:Other Bug Reproducible:Always
 
Summary:
When trying to debug mobile device layouts using Safari device debugger feature from Developer -> <device name> -> web inspector Safari only recognizes one Simulator instance even though Xcode 9 added the ability to run multiple iOS Simulators next to each other.

Steps to Reproduce:
Open multiple iOS Simulators and open a website. Open Safari and try to get the web inspector for each simulator

Expected Results:
Should show all simulators currently open with device dimensions and simulated OS running.

Actual Results:
Safari only shows "Simulator" which refers to the first iOS simulator instance opened.

Version/Build:
Safari  11.0.1 (13604.3.5)

Configuration:

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