Would not surprise me. Although it looks like F-Droid is hosted with Hetzner, I have encountered more than one failure to rotate certificates on account of Linode API changes, requiring manual update of the Python Linode API client to resolve.
This should be an oxymoron. We've forgotten the point of an API as a profession and it's downright shameful when something this important breaks needlessly. Would it have been that hard to just keep supporting whatever API calls were in existence as e.g. "v1" and put their new stuff in "v2"?