Created attachment 126990 [details]
vcard of the event
I have google calendar configured to sync with my ubuntu-phone.
At some point I noticed that, one of my events get update event without I changed it, and I contacts that I ever send an e-mail was added to it as attendee.
I noticed too that the event got some properties (even attendees) triplicated as you can see on attached vcard.
Created attachment 126991 [details]
There's nothing in the sync logs about the modified "ignore me" event. I need more detailed logs (loglevel=4) from both local side and the target side before I can say anything more about this.
In particular, nothing shows that this modification happened while the data was being processed by SyncEvolution.
Can't help without further information, closing.