Adding a new tag to a card has unexpected behaviour

[reox]

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Describe the bug
When I add a new tag, which was previously not created, directly to a tag, it leads to the following unexpected behavior:

• The tag is correctly created and assigned to the card
• However, the colors in the list of available tags and the assigned tag are different. The assigned tag usually is gray.
• There are now two different behaviors:
  • a) closing the card
    • no tag shown in the board view
    • But the tag is still attached to the card
    • When opening the card again and selecting the same tag name from the list, the tag appears twice and the one with the wrong color can be deleted
    • If you close the card now again and open it, you cannot delete the duplicated tag with wrong color! But you can delete the correct tag - which will also delete the wrong tag.
    • If before opening the card again, the board is reloaded, then both tags will have the same (correct) color. You can delete them independently, but if you close the card both will be gone, even if a single one was deleted.
  • b) staying in the card
    • If now the tag is selected from the list of available tags, nothing happens and the tag with the wrong color stays in the list
    • But the tag cannot be removed either. It can only be deleted when the card is closed and opened again

To Reproduce
Steps to reproduce the behavior:

1. Create a new tag from within the card:
   
2. Tags have now different color:
   
3. No tag is shown for card "fazbaz":
   
4. But tag is still there:
   
5. Adding the same tag again duplicates the tag:
   

Expected behavior
If a new tag is created, it should behave like a normal tag

Screenshots
see above

Client details:

• OS: W11
• Browser: Firefox
• Version: 134
• Device: Desktop

Server details

Operating system: Debian 12

Web server: nginx

Database: psql

PHP version: 8.2

Nextcloud version: 30.0.5

Deck version: 1.14.3

Where did you install Nextcloud from: the internetz