Yep, it confirms what I thought. The problem is probably on the icanhazip side. I’m validating this issue nonetheless to implement the two first fixes I suggested earlier. It will be fixed for v0.2.0. Customized Public IP Providers will come in another next patch. 
Bug validated.
Issue #7 on the repository tracker.
That’s a great idea! I’m continuing the discussion about it in Customize Public IP Providers to avoid off-topic.