SOLVED! Forgot to update this but we solved it pretty fast after discovering it. Bundles have been working fine the last week or so.
We started getting reports that something was going wrong with purchases of bundles in the store, and could repro it 100% of the time. Nothing other than currencies were being awarded in bundles.
We've pulled the bundles for now while we look into the issue. We didn't push an update to anything over the weekend (and certainly not on Sunday night!) so we're definitely confused, but are trying to track down the issue.
Sorry for that!
If you've made a purchase and didn't get your stuff we'll get you compensated with what you bought, but first wer're trying to figure out why this is happening in the first place. We're working on it! Apologies.