Unstable tag/label custom color selection in Deck Nextcloud

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Describe the bug
Unstable tag/label custom color selection in Deck Nextcloud.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'a deck board'
2. Click on 'the ... and select 'Bord detail'
3. Go to 'tags/labels'
4. Add new tag/label
5. click color field
6. go directly to custom color field and do not select preset color
7. select your choice
8. sometimes it works, sometimes it doesn't!

Expected behavior
stability

Client details:

• OS: MAcOS 11.14 (Big Sur)
• Browser: Firefox 90.0.2
• Version: Nextcloud 20, Deck 1.2.8
• Device: Desktop

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

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

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud 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, …)

Insert your Nextcloud log here

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log
c) ...

Start in a Deck board by opening board details, going to tags/labels, and reproducing custom color selection without choosing a preset color first. Inspect the browser console and network log mentioned in the issue to compare successful and failed selections; done means choosing a custom color works consistently.