Since last Update today fields aren't saved anymore

[Tux12Fun]

Describe the bug

A clear and concise description of what the bug is.
......
I add a field to the contact. After leaving the App the field isn't saved. If I add a new propertie the Input Boxes are shown twice.
......

To Reproduce
Steps to reproduce the behavior:

1. Go to contacts app
2. Search Contact
3. Click on Contact
4. Add a new Property like gender
5. The Property is shown twice. Once right once left.
6. Choose gender or edit the property value.
7. Jump to a other contact.
8. Leave the App -> goto Calendar.
9. Go Back and serach the Contact.
10. Property is missing (not saved)

Expected behavior
Property should be saved correctly

Actual behavior
Seams that save doesn't occur

Screenshots
If applicable, add screenshots to help explain your problem.

Server configuration

Operating system: Windows, Linux, MacOS...
Linux Raspi

Web server: Apache, Nginx...
Nginx

Database: MariaDB, MySQL, PostgreSQL...
MySQL - MariaDB10

PHP version: 7.3

Nextcloud version: (see Nextcloud admin page)
17.0.2

Contacts version: (see Nextcloud apps page)
3.1.8

Updated from an older Nextcloud or fresh install:
updated

Signing status:

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

List of activated apps:

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

Nextcloud configuration:

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

or

Insert your config.php content here
Make sure to remove all sensitive content such as passwords. (e.g. database password, passwordsalt, secret, smtp password, …)

Client configuration

Browser:
Google Chrome 78.0.3904.108

Operating system:
Win 10

CardDAV-clients:

Logs

Web server error log

Insert your webserver log here

Nextcloud log

data/nextcloud.log

no log messages

Browser log

How to access your browser console (Click to expand)

Chrome

• Press either CTRL + SHIFT + J to open the “console” tab of the Developer Tools.
• Alternative method:
  1. Press either CTRL + SHIFT + I or F12 to open the Developer Tools.
  2. Click the “console” tab.

Safari

• Press CTRL + ALT + I to open the Web Inspector.
• See Chrome’s step 2. (Chrome and Safari have pretty much identical dev tools.)

IE9

1. Press F12 to open the developer tools.
2. Click the “console” tab.

Firefox

• Press CTRL + SHIFT + K to open the Web console (COMMAND + SHIFT + K on Macs).
• or, if Firebug is installed (recommended):
  1. Press F12 to open Firebug.
  2. Click on the “console” tab.

Opera

1. Press CTRL + SHIFT + I to open Dragonfly.
2. Click on the “console” tab.

No error messages in web Console.

[CoudCoud]

I'm also affected by this bug.
I don't know if it's related, but since this update, when I try to import a .vcf file, the UI says it imported the contact, but it also says that this contact is defective ("contact défectueux" in French) and that I need to open a console in my web browser.

[skjnldsv]

I will need a screenshot of your network requests.
Before you do anything, still on the development tools, there is a tab called network. Click on it and then the xhr filter. Do your action and screenshot the network log like this:

[CoudCoud]

Hello, here is a screenshot.

I also tried to add a new contact, and I have the same problem as #1452

[jaller94]

Can we change the title to include the version number (likely 3.1.8)?
The statement of "last Update today" becomes outdated quickly and makes it harder to classify the ticket by reading it's name in the list of issues.

[tdoerschel]

Hi, it seems to be a duplicate to #1453
I added my info there

[skjnldsv]

Yep, seems like it! :)
Closing in favour of #1453, thanks for the help here!!