Hi @ZipFoxtaur
I’m sorry to hear about the issues with IPv6 when attempting to sync with Google Drive in Codebook for Windows. We are not aware of any specific issues regarding usage of IPv6 with Google Drive, however, we have previously recommended [1] disabling IPv6 when customers have faced local WiFi sync issues. This recommendation is based on results reported from customers.
Unfortunately, we do not have a IPv6 environment to perform local testing against for Google Drive. If you get the opportunity, would you mind enabling IPv6 again and attempting a sync with Dropbox instead to see if you face a similar issue?