External display doesn't wake up in Mac Mini 2018
Hello, I had been using a 4k external display (BenQ EL2870U) in my Mac Mini 2018 since I bought it last December with Mojave with no issues. I have recently upgraded to macOS Catalina and since them most of the times when the screen goes to sleep it doesn't wake up anymore. The only solution is to manually reboot the computer and then the screen is detected again.
Using Screens I have connected to the Mac mini while having this issue and open the display properties in the configuration and curiously it says that my screen is Retina Integrated Display (which is funny for a Mac mini)
I tried to unplug the screen from power, to unplug the HDMI, to change resolution but it doesn't change anything, it's like when the screen goes to sleep it is not detected anymore by the computer.
I have seen some people reporting this problem with Macbook Pros and iMacs, but nobody in a Mac mini, an indeed no solution has been proposed. That's why I open again this question.
Any ideas?