Plugin Portal gone havoc?

It seems the plugin portal has gone havoc.
Try opening, it will not load.

That URL should not load. There should not be a JAR at the coordinates of the plugin marker interface.

The actual artifact is
as indicated in

Current behavior is that this JAR is checked when resolving plugins, but redirects to JCenter. If JCenter doesn’t return a 404 quickly, the error is misleading. There’s been much discussion about this and the resulting issue is

Ah, so it is a laggy JCenter that causes the build to fail with “HEAD request not possible”? I see.
Is there any estimate when this is worked around in the portal?