We are administering the hotfix upgrade RT3401 to fix the treasury flow.
Specifically, the runtime hotfix RT3401 would include the fix for the Treasury spending flow issue: change of the SpendOrigin on the Treasury pallet to allow either Root or more than half of the Treasury Council. The flow will work as described by Alberto but only with the spend_local extrinsic for the time being.
Moonbase Alpha has already been updated. The proposal for MR is live, and we plan to put a proposal for MB next week.