We still can't push a flow with a template...

When you do this now, you stil have to go to each flow and select the number you want to use to send the message from.

Possible short term solution:

Always default to the default number of the subaccount.

This way, all accounts with only one number attached can still push updates via the snapshot, without having to manually check each individual message.

long term solution:

let the devs figure out how to dynamically update the assigned number.