It has nothing to do with the platform. When you copied your link on Launchpad, you did so while you were on the edit page. That’s a reasonable page for you to be but for someone to view it, it doesn’t make any sense.
Using development versions is like running with scissors. As a developer, I can tell you there are many times your system will become totally unusable if you try to use it as your regular system. This is often intentional. Maybe intentional is not the best word, but it’s a known issue that is necessary to progress to the point where the issue is no longer there. For example, when transitioning to new versions of major libraries, there can be long dependency trees that require so much time to resolve that there’s no way one can expect the system to just work the next day. Look at the Plucky Release Schedule especially as it relates to transitions and you’ll see there are indeed some major things happening this cycle, right now, and even the month before release! If you’ve been using development versions for 20+ years, I’m sure you already know this, but maybe you’ve gotten lucky and don’t.
In any case, if this is a bug, you’ve already done the necessary step to get it resolved: report the bug. Give it time. If you believe, on the other hand, that this is an issue that requires support, then this is the right place. Doing both probably doesn’t make a ton of sense.
That said, why are you trying to install the i386 version specifically?