S-Link with expander

Came to think about two things while driving home from the church I have been helping getting their new Sq6 setup stable:

1: If they turn on the AR2412 + AR0804 before the SQ6, they often have no sound through until they powercycle the two boxes.
Is that normal?

The AR2412 is the new black model, but the AR0804 in this situation is the old purple one (they have ordered a brand new black one, just waiting for it to arrive)

2: if the AR0804 lose power, will that bring down the entire SLink chain and cut the output from the Ar2412?

The sq has the v1.51?

I can try this for you? I have a set of ar2412 an ar84. Never tried before.

What is written in the io menu at the slink tab dx dsnake or nothing? If there is no audio.

The SQ has 1.4

I have no idear what it writes in the IO tab when the audio fails, and the ones running the desk in the church are all pretty green.

I will see if my contact can ask around but I doubt anyone of them has noticed.