I managed to resolve the issue by installing Google Calendar. It seems that Google Calendar needs to be installed in order for MIUI Calendar to sync the selected calendars. Anyone knows how to bypass this requirement? It is quite pointless to keep 2 calendar apps when I only need 1 of them.
That's the stupid part. Once I uninstalled Google Calendar, the MIUI Calendar app will not be able to detect the calendars anymore. In order to use MIUI Calendar, I will need to have Google Calendar installed. Frustrating...
And what's wrong with that? Miui is Chinese rom. They don't use Google Apps so in order to have Google functionality you have to install some Google apps.
IMHO this does not affect only MIUI but all android phones: if you want to have Google cal sync, you must have Google Calendar installed now. No matter that you may wish to use other calendar app...
Sent from TapaPlaudern on Mi2S 32 GB. Use "like" button if you want to thank me.