We're currently elbows deep a backend overhaul that should smooth out a ton of weird little state issues (things like the saved button "flickering" and interactions waiting on network round trip to apply). This touches so much of the app that shipping a TF now would turn up a ton of stale-on-arrival bugs, so we've been holding off shipping a TF until we get that merged.
By the same token, we're targeting a TF build more or less the moment that drops--the PR is https://github.com/mlemgroup/mlem/pull/556 and it just entered draft yesterday, so I'm hoping to have it in by the end of the week.
Re: pinned posts, that's an instance sync issue as far as I can tell--they're not pinned on .ml, but we've heard similar reports from beehaw users.