Weird 2000ms delay when loading page from a .local TLD

Description

I'm handling WebResourceRequested to serve local content.

When using .local TLD (e.g. http://content.local), there is a weird 2000ms delay between loading the page and loading its dependencies:

+++> Requested at 00000ms http://content.local/popup.html
+++> Requested at 02002ms http://content.local/public/css/base.css
+++> Requested at 02003ms http://content.local/public/css/popup.css
+++> Requested at 02005ms http://content.local/public/js/base.js

When replacing "local" with, say, "locad" or "com", there is no delay:

+++> Requested at 00000ms http://content.locad/popup.html
+++> Requested at 00018ms http://content.locad/public/css/base.css
+++> Requested at 00019ms http://content.locad/public/css/popup.css
+++> Requested at 00021ms http://content.locad/public/js/base.js

Same goes when using .local, but adding another label to the hostname, e.g. some.content.local:

+++> Requested at 00000ms http://some.content.local/popup.html
+++> Requested at 00015ms http://some.content.local/public/css/base.css
+++> Requested at 00017ms http://some.content.local/public/css/popup.css
+++> Requested at 00018ms http://some.content.local/public/js/base.js

Version
SDK: 1.0.1018-prerelease
Runtime: 95.0.1020.30
Framework: WPF
OS: Win10

AB#38522597