[bitfolk] HSTS fun on bitfolk.com

Yesterday I spent several hours trying to figure out why a dev website I am running on my bitfolk vps under a non-standard port, kept failing to load in my main browser - every time I visited it using http:// it kept directly requesting a https:// page .. which doesn't exist. I twigged fairly early (cos internet searchings) that it was probably something HSTS related (https://www.globalsign.com/en/blog/what-is-hsts-and-how-do-i-use-it/) .. but no amount of removing "jandj.vps.bitfolk.com" or "jandj.vps.bitfolk.com:8002" from hsts ( vivaldi://net-internals/#hsts ) was doing anything. I eventually realised that the main bitfolk.com itself is sending hsts-required headers, and including all subdomains, which seems to trigger regardless of port :( Removing bitfolk.com fixed it for now, though presumably it will return if I visit the toplevel site again. Any ideas if this can be worked around? (other than the obvious buy another domain / use one of my other ones temporarily) Jess