Yep. I'm experiencing similar issues with delayed responses from my voipo voicemail to my voicemail indicator on my phone as well. Would really love to get this issue resolved. I'm sure it must be a simple setting that has to be configured, because a I have two Voipo lines one of which I have the Obi202 attached (experiencing this issue) and another with a Linksys SPA3102 not experiencing this issue.
Please help!