IOS – Google Calendar won’t sync after update on 9.2.1

I have recently updated to iOS 9.2.1, and now my Google Calendar isn't syncing anymore. If I add event on my desktop (Google Calendar App inside my browser), events are added and synced to my iPhone, but if I add event inside my Calendar app on iPhone, events are never synced to my Google Calendar, they only exists on my iPhone.

I have tried to restart phone, and reset network settings, but without luck.

EDIT: I have also noticed red exclamation sign on iCloud calendars, maybe is this issue?

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