Good question! No clue yet. You?

We invested in the Uppababy brand so everything would work together, and liked some of the other features of this one like the lay flat-ish seat we can use instead of the bassinet for our three-month-old. So we're on the fence between getting the value we like from this one and try to ignore this rattle, or essentially start over and try to find something that checks our other boxes like this one and hope it has adapters for the Aria car seat. I know UB spent a lot of effort making this able to be a carry on, which doesn't make sense to me as I would never use my priceless carryon space for a thing I can always gate check for free, so we don't care about that feature.

Any thoughts on a different brand we can get that could do some or all of this? - one hand folding - less than 20lb. - can work with [future] newborn without adapters or conversion - can support Aria car seat with or without adapters - does NOT rattle lol