I am not using a 202, rather a 2182 phone with a Google number. I have not see that issue with GoogleVoice on my device. Many people here probably use the same setup as you (GV on a 202).
However, I have had that problem with a couple of the other numbers which all go to a different provider. All those other numbers point to a single server and the other day, a couple of those connections failed. Rebooting did not solve it. I had to change servers for those failed connections. I also am quite far from any 'point of presence' or server to conenct to, compared with most other users as I am in the middle of the Pacific with various Internet anomalies like delays due to transpacific cable lag, etc. Thus I don't think I have the same problem as you but even with the issues I can have, the Google line seems quite robust and works well out here.