At some point in the last couple of weeks it appears that I stopped being able to SSH to new instances. I created one 3 weeks ago that works as expected, but yesterday and today I've been unable to connect to any newly created instances.
I've tested this on both the Wikilink-Tool and Hashtags projects - I can connect to the existing instances no problem, but if I create a new one I get Permission denied when attempting to SSH.
@Lucas_Werkmeister_WMDE also had the same problem earlier today in the wikidata-dev project.