Interesting, I have the exact opposite gut reaction. It could be rephrased in slight variations, e.g. "until we've figured that out", or, as shokwave below suggested, with a request for assistance, but in general, if someone said that to me, I would, ceteris paribus, infer that they are a self-aware and peaceful/cooperative person and that they are not holding anything in particular against me.

Whereas when someone leaves a conversation with an excuse that may or may not be genuine, it leaves me totally stressed-out because I have no idea what's going on and now I have the burden of figuring everything out on my own, about another person who is obviously intent on not sending many informative signals. Great.