RAM Client API cacheing ?

I have an application that uses the ram public api and we have encountered situations where we get unexpected results on calls such as RAMSession.getCommunity("community name") where the community is not found, but a subsequent call to create the community fails with "community already exists" . Is there a delay as to when a community is discoverable ?? or perhaps some level of client side cacheing that is done that may give me these sort of results ??