There are those who have been experiencing the failure to load on the VDBv1 Live Feed (Stuck at 3 of 3) claiming that placing the doorbell in permanent “Night Vision Mode On” fixes the loading issue. The only drawback being that it will return only B\W video. Perhaps this is why it performs better at night?
Note that @WyzeJasonJ has indicated in that thread that there is a RC Beta in the works that will hopefully deal with the issues.