Buffer stuff - When you poke via gen~ and peek with another one, is there a latency/vector size involved?

Hello,

When i poke a buffer via gen~ and then peek its content directly i have latency. That disapear when i set 1 sample for signal vector, but its not a proper solution.

Is it a normal behavior? I'm i missing something, a box to check?

Do you have a solution or how do you do that?

Thx