Thumbnail box background color blocked at blue

Since beginning of this week, the background of my thumbnail box switch to blue and I’m not able to restore previous colors. Before the colors was grey and nothing has been modified.
Exemple :
Does anyone have the problem ?
Thanks for your help.

Hello Michel,

I confirm it is an issue. I will get back to you in a bit with a solution


OK, thanks Konstantinos.

Hello again Michel,

I applied a fix to the components module. Since the update happened this week, the next one will take a couple of months so I installed the release candidate locally to your website.

When the next update will take place, can you remove the local module so that you will get update?