Our issues are LumaLink connections... Slow and unreliable.
DDNS, Port forwarding etc are fine... Except for a handful of NVR's that just crash and go off line spontaneously... OVRC shows them in "limited connectivity" status.. But cameras connected to the NVR's are good. Only solution is a hard reboot of the nvr... At first this was only in a few locations. Now much more widespread.
I'm Not an engineer, but I play one on TV. My handle is Tweety but I have nothing to do with the organization of similar name. I just had a really big head as a child so folks called me tweety bird.