If you decide to upgrade and genuinely think you've found an issue that is with the container, by all means lodge an issue on github with the relevant information. But I think what we're trying to say is we're confident the issues we've experienced are neither due to PEBCAK errors or problems with the container itself, and we're satisfied that the root cause was the Unifi software.
And running bleeding edge Unifi software is fine for some, notably those that can get themselves out of a mess if they need to, but we're absolving ourselves of any responsibility with this, which I'm sure you'll agree is an understandable standpoint as many many users on here and on other platforms are not as tech savvy as you and I.
We're all volunteers with lives, families and jobs to do, so helping Unifi support and debug their beta releases isn't something we feel we want to do with our spare time.
If you wish to take the mantle of helping anyone with the beta Unifi software here, then be our guest.