Chrome Version: 65.0.3325.107/10323.46.0 beta-channel Daisy,Reks
OS: Chrome OS

What steps will reproduce the problem?
(1)Recover build>> Connect to a Network and Open proxy overlay 
(2)Click on Custom name servers and again click on Automatic name servers and observe 

Expected: Values should be seen when clicked on Automatic name servers
Actual: Delay is seen in appearing of values of Automatic name servers

This is a Regression issue as same is working fine on M63 stable

NOTE: Issue is not seen on Windows and Linux
      On M64 stable only ,.,., is seen when clicked on Automatic name servers
      Issue is seen on M66 dev also

@Stevenjb: Please confirm the issue
 

Deleted: ActualDelay.mp4 5.7 MB

	ActualDelay.mp4 5.7 MB View Download

Deleted: ExpectedDelay.mp4 6.1 MB

	ExpectedDelay.mp4 6.1 MB View Download