Based on the provided information I'm not completely sure what the exact issue you are facing is.
Using the sample markup below on my side, behaves properly an the month navigation button correctly navigate through the months:
Can you please elaborate a bit more on your issue so that we can advise you further.
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items