I dont think anything can be done about this. Its an issue with most wireless cams that run off of battery in order to save battery power. PIR runs on very low power and starts up the cam only when it senses motion. It takes a few seconds for the cam to start up after the PIR sees motion.

Im pretty sure thats where you're getting your delay from.

I have the opposite problem. I cant access my argus 2 unless i use my cell phone and take it off of wifi.

Support told me to unblock ports 1-65535 on my router since the camera apparently just picks a random port every time you want to access it.

Thats every single possible port there is, and support told me to just open my entire network to the internet so my cams would work.

Thats absolutely ridiculous. DO NOT do this if support tells you to. I'd be ok with opening one or two ports directly to the cams, but im not exposing my whole network to the internet.