Experience manager component icons won't load in brXM

In the upgrade to 15.2.0, the component icons look like they are loaded through the front end. This issue only shows up when you apply the "org.hippoecm.hst.configuration.channel.PreviewURLChannelInfo_url" property on the "hst:channelinfo" node.
It seems to redirect these resources to the front end, which does not seem right.
This is also occurring in the 15.2.0 archetype.

Steps to reproduce

-> Created an blank archetype 15.2.0

-> Added some components and icons were loading.

-> Now in console at path "

" with the string property. 

Property Name : "org.hippoecm.hst.configuration.channel.PreviewURLChannelInfo_url" 

Value:http://localhost:3000

-> Now icons are not loading.

Attaching the screenshots.