Question Inconsistent behaviour with callbacks and finind root elements

For about a week now I have been trying to debug an issue. for a while, my UI Documents have been inconsistent with whether they receive input events, like MouseDown and such, requiring me to restart unity to fix it. Then, for a while, it stopped receiving events altogether. But just yesterday, it goes between receiving inputs, but some/all of my scripts believing that the UI Document's rootVisualAsset is null, to most of them working properly, but no events processed. The behavior changes when I restart unity.

What on earth could be causing this? How do I troubleshoot it? I've been banging my head into a wall for a week on this, going up many dead-end paths, and it is frankly driving me mad and has ground most forward progress to a halt. UI Toolkit has been treating me nice so far. I didn't touch anything to cause this to happen. Could it be the domain reloading? I have no earthly idea. Does anyone else have a clue?

Using the new input system on 2022.2.0b16.112.5806, Windows 10.