Don't know what's the actual reason for such behavior apart from what I could see in log. ps. it happens in 4.5.0 & 4.5.1 18:24:02,155 DEBUG [HttpClientSupport$SoapUIHttpClient] Stale connecti...
Sorry...should have been more specific. Where can we get the nightly build of the soapui-pro-maven-plugin? Is there a snapshot repository we can point to?