Hubzilla doesn't work well with Resist Fingerprinting
As I've just found out, if you're using Firefox or a Firefox-based browser, and you've got Resist Fingerprinting on (that's a setting only available through about:config, and various forks have it on by default), then Hubzilla will act up. For example, certain characters won't show as intended.
An even better example: The age of notifications and the like will be shown wrong because Hubzilla receives the wrong timezone information from you.
So here's a good advice: If you use Resist Fingerprinting, add the Hubzilla hubs you're on to the exemptions.