Title in Owncloud Tasks application has some invisible [OBJ] objects?

Hi

Thanks for already many years one of the best Owncloud app without problems at all.
Not a big problem but annoying:

Steps to reproduce

  1. Owncloud Tasks sync with iOS Reminder (working without problems for many years)
  2. Owncloud 9.1 + Tasks 0.9.3 + iOS 9.3.5 + OS X El Capitan 10.11.6
  3. Old and new tasks have weird invisible, when clicked visible, [OBJ] object in title

Expected behaviour

Tasks title has not to have some invisible [OBJ] object in title.

Actual behaviour

Tasks title has some invisible [OBJ] object in title, they become visible when title is clicked.
The amount of [OBJ] objects in title is always different.
See screenshot, in this task title there are 5 in front of the title.

screen shot 2017-04-28 at 14 55 38

Server configuration

Operating system: Debian Linux

Web server: ?

Database: MySQL

PHP version: 7

ownCloud version: 9.1

Tasks version: 0.9.3

**Updated from an older ownCloud or fresh install: update

Signing status (ownCloud 9.0 and above): ?

Login as admin user into your ownCloud and access 
http://example.com/index.php/settings/integrity/failed 
paste the results here.

List of activated apps: Tasks and Calendar

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your ownCloud installation folder

The content of config/config.php:

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your ownCloud installation folder

or 

Insert your config.php content here
(Without the database password, passwordsalt and secret)

Are you using external storage, if yes which one: no

Are you using encryption: no

Are you using an external user-backend, if yes which one: WebDav Owncloud Client

Client configuration

Browser: Safari

Operating system: Mac OS X El Capitan

CalDAV-clients: Reminder

Logs

Web server error log

Insert your webserver log here

ownCloud log (data/owncloud.log)

Insert your ownCloud log here

This can be directly reported to the developers, as you already did: