Moving through records with up/down arrows

I’m confused about shomething… with a form open (not data sheet) if I press on the up or down arrow on the keyboard SOMETIMES I scroll through records as expected, other times I just get a warning beep and nothing happens. I can’t figure out why this is.

You will get a beep when you try to go up from the top visible record or down from the bottom one. Perhaps you have only one visible record?

That’s not the case here.