Yep. Has happened to me quite a few times. And since it's "only" 1,000 points usually I can't be bothered following up, especially when there's no written proof of the bonus.
I chalk this up to the bogus additional points that are offered as part of promos with nightly rates at several hotels. Some are 1,000 a night, some are 2,000 a night. If it's just one night and 1,000 points I can't be bothered. But I have 100% failure with these rates posting the bonus points at all without intervention of some kind.
-RM