Can't create custom label for phone number within Phone-grouping, creates new one

[cyberwolfie1]

Describe the bug

I want to give a custom label to one of the phone numbers I have for a contact, as the standard ones do not apply. If I try to add a new number, and write a custom label, what happens when I click save is that a new Phone-grouping is created with this new label, instead of it being listed as a new number under the original grouping. I now have two Phone-groupings. Choosing one of the original labels behaves as intended.

Within the new grouping, it is not possible to add new numbers, even with the original labels. Clicking the "+"-button does nothing.

The same is observed for the e-mail-field.

Steps to reproduce

1. Go to a contact in the Contacts app in the web interface
2. Click on the "+" under the Phone category to add a new number
3. Click the label field and write custom label, hit Enter
4. A new Phone category now appears.

Expected behavior

When I enter a custom label for a phone number (or e-mail), it should still be placed in the original Phone-grouping (or E-mail-grouping) where it was created, and not create a new one.

Actual behavior

As soon as I hit Enter after writing in the custom label, it creates a new Phone-grouping with the correct label. In this grouping I cannot add new numbers.

Contact version

6.0.0

Operating system

Nextcloud AIO Docker container (29.0.8)

PHP engine version

None

Web server

Apache (supported)

Database

PostgreSQL

Additional info

No response