yep, you are right. It was being tracked here. Like you have noted correctly, you can just change the URL from 5.x to 5.5 and it fixes it. https://github.com/elastic/kibana/issues/13123
I also found out by looking at this issue that kibana 5.5.1 went out 2 days ago.
So I think I'm gonna upgrade to 5.5.1 and will make some patch on the fly into my Dockerfile until 5.5.2 is out.
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