Finale has a plug-in that can correct the error here of the tempo marking being longer than the bar rest. I know how to manually adjust it, but is there an automated way to do this so that I don’t have to do it every single time there’s a tempo change over a rest?
I don’t think there’s an automatic way.
But is this an error? Surely you wouldn’t make a single bar as long as this…? 
Not quite that long, but I also shouldn’t have measure numbers bump up or tempos go off the page because the bar was too short for it. That’s the bigger issue for me.
I also think in your case, setting the bigger issues you point out aside, the example is just so close to fitting that it seems a visual shame not to.
But as @benwiggy’s marvelous (and hilarious) counterexample points out, it’s always an interesting question where boundaries lie.