If he is working on the issue, yes. If he claims to be working on the issue, it may be hard to tell right away if he really is working on it or he's just lying some more to get you off his back.

I'm informed by reliable sources that (a.) liars can tell the truth but that (b.) if you're a liar and you're going to tell the truth, the first truth you have to tell is that you're a liar.