Calendar: Event with local participant is automatically added on participant's calendar

I'm sorry for my english.

Steps to reproduce
1. user A add an event in his calendar, and add user B like participant
2. user B receive a mail from owncloud server mail, not by user A mail, and the event is added on his calendar
3. user B don't want accept all event without his permission

Expected behaviour
Before version 9.1 from owncloud, the event was not added on user B calendar. We prefer this.
Where is the parameter to retrieve this good comportment?

Actual behaviour
Tell us what happens instead

Server configuration
Operating system: debian 8
Web server: apache
Database: mysql
PHP version: 5
ownCloud version (see ownCloud admin page): 9.1.3
Updated from an older ownCloud or fresh install: updated
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption):

ownCloud log (data/owncloud.log)

Please paste possible errors in the following code block, see for more info

Integrity status for oC9+

Login as admin user into your ownCloud and access
paste the results here.

There is no such parameter / configuration to change this behavior.

What previous version are you referring to? Please not that all the calendar stuff was rewritten for OC 9.0 and later. So if it was better in OC 8.X, it just has not been implemented yet. Also check the bugtracker if there are already pending feature requests
If you lost this function with an update from 9.0.x or even 9.1.x, please report this directly to the same bug tracker.

thanks for your answer.
Our problem is the automatic event added on the local particpant's calendard, in previous version, there's not this added.

I'll open an issue on github.

Best regards