The Director’s supposed to notice these things…
If you notice something that nags at your brain while you’re shooting, fix it then. Learn to trust that little voice. If you don’t at least speak up, then forever afterwards, you’ll see that same glitch and cringe inside. Chances are, three other people have noticed, but no one wants to be the first to say anything.
If you’re not sure about this, watch the last movie you finished. I’d bet three juicy fish-heads that there’s at least one wince-worthy moment in the movie that if you look back, you’ll remember when you saw that on set and thought “Oh, I’m sure it’ll be fine…”
Plus, it’s a lot more ’spensive to remount a set. Even if you’re not sure, or being dismissive of that little voice, it rarely hurts to film one more scene with that little thing taken care of. I mean, while the crew’s there and the actors are there and the set is still prepped and lit and, well, while you think of it…