Ajax bug [events don't get loaded]

When you have a setup with 1 contextual filters
1) content type

Say you filter on article and the current month is septembre. Ajax is turned on.
1) Add an article with a date in octobre
2) Go to your article filtered calendar
3) Move to octobre ==> no events
4) Add an article with a date in septembre
5) Go to your article filtered calendar ==> You see an event
6) Move to octobre ==> You also see the second event

So when there are no events in the "start month" ajax filtering is broken.