Hi,
I had same problem.
I uninstalled and installed graphic card's driver again.
Then I change screen frequency to 90Hz because I was on 144Hz.
I don't have Display port on my laptop.
So I use USB-C to Display port.
Now it works very well.
If it continue to upside down, you can uninstall HTC and Steam software then install again.
I hope it will help you.
Warriorx43