To resolve this issue, you can try changing the SecureDNS Server settings.
Start by clicking on the three-dot button on the top right of the screen and click "Settings".
Once on the settings screen "Configure SecureDNS" from Settings.
By default the primary SecureDNS Service is selected.
Choose the Secondary SecureDNS to see if there is an improvement in the SafeBrowser internet connectivity.
Please note: It is not recommended to Disable SecureDNS.