Creating a Route fails with "HostAlreadyClaimed"

Issue

• Creating a Route object fails with "HostAlreadyClaimed" even though solution 1607483 does not apply.

• The router logs contain the following messages:

  <snip>
  
  I1031 14:02:41.285116       1 router.go:454] Router reloaded:
  - Checking http://localhost:80  ...
  - Health check ok : 0 retry attempt(s).
  E1031 14:03:08.361897       1 router_controller.go:246] another route has claimed this host
  E1031 14:03:08.379939       1 router_controller.go:246] another route has claimed this host
  I1031 14:03:08.424682       1 router.go:454] Router reloaded:
  
  </snip>