Rainbow color after Steamos boot

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Describe the bug

Hello,

Since a month, steam os loads with rainbow color. Games load with correct color and if I close a game, it comes back to steam is with correct color.

I have not done any weird tweaking.

What did you expect to happen?

I expected the screen to load normally.

Output of rpm-ostree status

I will complete it at home.

Hardware

No response

Extra information or context

No response