I have only seen this happen at the pre-team level for young kids. They were invited and tried pre-team at age 4-6, but decided that structure wasn't fun enough or they weren't ready to focus, so went back to rec for a while before trying the team track again after they matured a little more. Those stories seem reasonably common (though I'd say many, if not most littles, do not actually return to JO team track after trying it once and not liking it).
As mentioned by another poster, I would think after about L3, there aren't a lot of Rec programs with high enough skills for a team kid to switch into and be challenged at all. Perhaps Xcel Bronze to Rec and back could be a possible path if for some reason a girl wasn't ready for, or couldn't commit to, the competition demands that year. Xcel is typically pretty welcoming, so coming back to Xcel after a break (for any reason) is, I think, generally acceptable and possible. Returning to JO is generally very, very difficult.