All the files look the same between all 3 models. Is that supposed to be that way?

I usually roll out to the hardware that closest at first. let it soak for a bit. Then roll it out further and further.

Upgraded on my self hosted ubuntu controller... so far, its working like normal.

Have you tried to configure a different port on the router? the port could be bad?

Upgraded several ER7602 V2 on our large Ubuntu self hosted controller. All is working at it's normal abilities.

Which categroeis did you select? All of them?