I experimented a little with an arcane archer using a repeater: the imbues didn't work if I played as I normally would, they didn't turn on if I started with the crossbow equipped, but if I swapped to a longbow the imbue would activate and then if I swapped back to the repeater it would stay activated and work just fine.
Clearly there's a bug here, but I don't know where the bug is - I read that the arcane archer imbues work with any ranged weapon, so is the bug that the imbues don't work initially? Or are they only supposed to work with a bow, and the bug is that they work with the repeater at all?
I kinda want to start an arcane archer artificer, especially with the new arti feats, but I don't want to rely on a bug to do it.