So my question is can the blocking/silent treatment be a form of silent treatment used to punish or control us?
It’s like that rhetorical question: how long is a piece of string.
As their way of interpreting phenomena in the world is based on transitory emotional states, any explanation might be the correct one.
She might be seething in a rage at the thought of you, missing you, or not remember your name over the course of any given day.
Trying to ascribe a logical motivation behind the behaviour is fundamentally fruitless, as they have little control over their behaviour/thoughts.
The only thing that truly works is to just get on with your day as if nothing peculiar ever occurred, and not contact them.