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Why do all the connected displays, including the laptop display on MacBook Pro (2018), go black each time I connect an additional monitor? The MacBook knows which monitor is already connected, via what/which port, and their properties as well, but why does it seem to refresh every time I connect an additional display? Is this normal behavior?

I use MacBook Pro 2018 - 4GB Radeon graphics - 16GB - 512GB SSD.

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