My personal bet would still be to at least try a different hub. I've tried like 6 different high quality, high powered usb hubs from well known brands. Every one of them was much more expensive than the one i'm using now but none was able to keep up. I ended up using 2 or 3 hubs just to supply enough power (1 hub per moonlander!).
In my opinion, this 10 port hub is a lot cleaner to place with just 1 usb cord and 1 power supply. So no hardware with open connections cluttering around etc. (Plus a lot smaller to place)
When i get the extra 5 moonlanders in that i have on order it will be nice to see if the stability stays with this hub.
Thanks for the vid btw! Wish i had that many MLD's

Another thing @jakegoodwin586: Have you changed the setting for the voltages on the core and or memory? Can you post a pic of the pot settings?
There is one other area that I suggested to Jake which may or may not be of interest here but folks often will overlook. The stability of the power source (coming from the wall) and if it is steady or sometimes fluctuates.
I have lived in areas (both in the US as well as abroad) where the power grids were not as stable as they are for me here. I never have lights dim, then go back bright, I rarely have power outages (only during heavy storms), and am fortunate not to experience surges. I will bet there are many areas that have massive fluctuations in power consistency coming from the wall.
I could be wrong but just something for others to think about when troubleshooting many ML2's being used.