Keypad doesn't change arm mode of the IP camera's

The keypad only changes the arm mode of the HomeBase 2.
The IP camera’s don’t follow the arm mode, you must switch them manually.
Is that normal behaviour ?

Yes. The wifi only cams are separate so you have to set them separately. Everything on the homebase can be operated together. Eufy says they plan to link everything at some point, but given their level of performance so far I wouldn’t count on it.