Impossible to delete an occurence of a recurrent event

[ZeHiro]

I have a recurrent event, and I wanted to delete an occurence of this event from my phone calendar app (Google calendar for android 6).
The occurence is not deleted and here is what I get in the logs (the log is repeated as It looks like the client tries several times to delete the occurence) :
CalendarQuery Perso Filters: [2016-10-11 14:14:36:803] info - caldav:backend | {"name":"VCALENDAR","is-not-defined":false,"comp-filters":[{"name":"VEVENT","is-not-defined":false,"comp-filters":[],"prop-filters":[],"time-range":{"start":"2016-09-27T00:00:00.000Z","end":"2017-05-23T00:00:00.000Z"}}],"prop-filters":[],"time-range":null} Recurring events need timezone.

[ZeHiro]

It seems EXDATE information is not managed

[clochix]

Your right, we don't handle EXDATE for now, feel free to add your voice to cozy/cozy-calendar#238