Portfolio view : Why some projects are underline and others not?

I’m using SonarQube 9.6.1 OnPremise.

On the Portfolio view :

  • I’m wondering why some projects are underline and others don’t ?

I looked into the documentation but I found nothing on this.
Thank you for your help.

Capture

Well, I found why ! It’s a visual bug in Firefox.

When I look into Chrome all projects are underline !