[Bug]: Photo edit stroke colour picker does not work. Up to 31.09!

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

This error persists up to version 31.09.
The error occurs when you open an image, click on “Edit” and want to select a color to draw a line, pencil or arrows.
You cannot select a color because the top window blocks everything.

I introduce the Bug Report, because it is rather old and only discussed in the help forum (with a suggested solution).

You will also find this on
https://help.nextcloud.com/t/photo-edit-stroke-colour-picker-does-not-work-truenas-nextcloud/158028

[JackDinn] discribes the bug as follows:
" The photo editor colour picker for stroke & shadow for all the tools (text, image, rectangle, pen etc etc) does not work. You can not click on anything.

For the colour picker the cursor changes to a cross when you hover over the colour picker and you can select a colour but on stroke & shadow the cursor does not change to a cross when you hover over the colour picker and you can not select anything.

I have tested with different browsers and on different computers with Windows and/or Linux.

Steps to reproduce

1. click on a photo
   2.click on edit
   3.try to pick a color for line, pencil or arrow.
   Result no color selected, stays black.

Expected behavior

One should pick a color.

Nextcloud Server version

31

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.4

Web server

Nginx

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

Fresh Nextcloud Server install

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

No response

No files, tests, logs, or app list are named in the issue. First reproduce the problem by opening a photo, selecting Edit, and trying to choose a stroke colour for a line, pencil, or arrow; then locate the photo editor entry point in the viewer. Done means the stroke and shadow colour pickers accept clicks and the selected colour is applied.