OK, looking at your INXI readout, it looks like you have dual GPU's just as I do. You have your Intel UHD GPU, and you have your Nvidia 1050 GPU. I'd like you to try something and lets see if we can fix this problem with a simple extensions...
Please install Nvidia Prime Indicator
And once activated, its going to be found in your taskbar, as seen by the picture they provided on the page. Make sure you have enabled Gnome Integration in your browser, then just click the on/off button toggle to install and activate.
I want you to select your Nvidia GPU only please with the extension in the taskbar. Yes, Nvidia GPU only, no Intel, no hybrid, just Nvidia. This should tell your system to prioritize the Nvidia GPU only.
Now lets see if you still have the same problem. If you do, I might have to recommend that we disable suspend capabilities in your system, as well as disable the notebook LID-Switch.