Production build loads w/ a `alert()` that says `0`

[fx]

When loading the production build of panel.js in home assistant, on load, we get an alert() popping up that just says 0

1. Figure out the root cause of why that's even happening
2. If possible, write a unit test to confirm it is happening (should test that it's not happening, which should fail right now, because it is definitely happening!)
3. Fix the issue.