OneConnect with SNAT/Automap -- Mask no longer matters?

If SNAT/Automap is used, the NATed source IP will always be a single IP address. Hence, all the mask applied will result in the same effect as 0.0.0.0. Is this understanding correct?

i think so.

Note: If SNAT is configured, the BIG-IP system performs SNAT address translation on the source IP address, and then applies the OneConnect source mask to the translated SNAT IP address to determine whether it is eligible to reuse an existing idle connection.

sol5911: Managing connection reuse using OneConnect source mask

Addind to that, between the both, which has precedence?

i understand persistence is checked first.