Dell XPS15 9500 USB-C Video Output Problems

So I bought this G-STORY GST156 external monitor to use for gaming with my XPS 15 9500 (or just as a nice additional monitor).  At first plug, using a direct USB-C cable into the USB-C port on the monitor, and things ran flawlessly.  On subsequent plugs things started to go south.  Eventually, USB-C to USB-C did not work at all.  I tried using a USB-C to HDMI, still no dice.  I reboot multiple times, check/update drivers, update windows, all that jazz.  Finally, one of the 3 USB-C ports (bottom left) starts to work with the USB-C to HDMI adapter - go figure.  Then, eventually, I get all 3 working again with the USB-C to hdmi adapter (have no idea why they eventually started to work).  Things have been working well since then with consistent use of the HDMI adapter.  

I requested a replacement monitor from AMAZON, thinking perhaps some faulty circuitry to blame here.  That new monitor arrived today, and largely - the same situation.  The first plug in, monitor lights up, reports 144Hz - works stable.  Unplug- replug - things start glitching, image flicks up on screen, but then goes blank, then comes up again.  Here we go again!  I try different ports, none work again using a USB-C to USB-C cable.  I switch to the USB-C to HDMI adapter - plug it in, no dice either - reports something about limited function in a lower right pop up on my desktop.  I try a different monitor - same problem, but eventually after several reboots, this time, the TOP LEFT TB3 port works with a different monitor.  Then another reboot, and now the bottom left and top left ports work.  Right now, I can't get the right USB-C port to work - it's not even working with thumb drive at the moment, so it's like it's a dead port.  

SO the reason I come here, is I saw the 10 page complaints about the TB3 ports on the XPS 13 9300, but nothing on the 9500.  Perhaps I just have a bad chip on my mobo for my 9500, but with the other thread, makes me wonder if this is an on-going problem that other 9500 owners have?  This isn't relegated to the TB3 ports, but both those two on the left, and the regular USB-C on teh right as well.  They don't seem to do well with video output, at least, in this particular setup.  I actually have two portable monitors (USB-C input) and one regular desktop monitor - and all have issues after subsequent plugs.

Is this faulty hardware, or some software?  I have updated everything I can think of using the Dell Update application - I'm not reinstalling support assist as that caused major audio glitches on my device, and I'm not interested in "reinstalling windows" as that can't always be the default way forward.