Fusion sends several emails whenever tasks are assigned automatically.

My current fusion flow is when content owners submits project requests it will automatically convert that into a project using a pre built template that I have defined. Later it assigns tasks inside that so for instance all the tasks realted to project manager should be assigned to this person. It is working perfectly fine but the issue is when the project has 10 tasks it sends 10 emails and I would like to built something like how workload balancer works were in only one email is sent rather than 10

how can I do that in fusion