I am gathering a list of #Mastodon quirks in implementing #ActivityPub in order to submit some tickets to github.
So I would like to hear from you if you're a developer of a service that uses ActivityPub and you had issues with making it compatible with Mastodon.
(PS. This is not meant to be adversarial, but a way for improving Mastodon at least through documenting the pain points of other developers when communicating with it.)