When HDR is enabled on external display, Monitorian does not control its brightness. Only works when HDR is Off

[oeloo]

Hi, I have a laptop (Dell) with an external monitor :

Monitorian is working great when HDR on my external display is Off.
But when I have HDR turned On on my external monitor:

In Monitorian, moving the slide for this external monitor is not changing anything.

For information, the built-in screen of my laptop always had HDR turned On, and this never caused any issue in Monitorian:

[emoacht]

Hi, have you read #411?

[oeloo]

No, though I had searched for "HDR" in the Issues and the Discussions BEFORE making this issue 🤔

PS: I understand now why, the status of the #411 issue was 'Closed' and the issue tab is filtering them by default.
Why is this #441 issue closed ?

[emoacht]

Perhaps you searched it with the conditions of is:issue is:open. To search all issues, it should be is:issue.
The reason why closed is that there is no clue at all to look into it. No hope. At least at this moment.