Manjaro darkens monitor's screen when I focus my mouse in the another monitor

I do not know what is happening on my Manjaro KDE, but when I focus in another monitor my another one darkens,

I do not know how to fix it, someone could help me?

I do not know kde, but could be a compositing effect? You can test by turning off compositing. If that works, you know that it is solved by adjusting the effect settings.

Check if you have selected the effect to “Darken inactive windows” and deselect it.

The solution was unchecked “Allow application to block compositing” in Compositor section.

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