Yikes, that does sound like a bug and thanks for reporting it! I am working on a new build for beta (a week or two away) that should fix this issue, and will post here when that is available for testing. In the meantime I will investigate further, but at this point, this does appear to be a bug... the issue is that some DAWs will send a Program Number 0 after they send the State Information, which Waverazor is interpreting as a "please load the last patch". I didn't catch this earlier, because not all DAWs do this.
Cheers! - Rob