V6: ion-datetime (with size = cover) inside ion-popover (with size = cover too) is not working

This is my code:

Fecha posición {{ posDate | date:"dd-MM-yyyy" }}

When I set size=“cover” in ion-datetime the right arrow for increasing month doesn’t work correctly. If I delete this attribute in ion-datetime or in ion-popover the calendar works perfectly. It only has an strange behaviour when size=“cover” are set at the same time. Is it a bug? What’s wrong in my code. I need to set size=“cover” in ion-datetime for expanding calendar space to all popover reference size.