If a Queue Process branch doesn’t run after being deployed (but has been added to the Package Watch List, etc.) it could be because the Branch Type has been set as something other than Module.
To change the branch type:
1. Please open 'Branch'.
2. Look at the Branch Properties (Project, Branch Properties).
3. As shown in the image below there is an option to select the 'Branch Type'.
4. Please select 'Module'.
5. Save and re-deploy the branch.