Hi @Haufe ,
Do you want to create a task in another bucket when the task completed in certain bucket?
Please check if the following flow will work for you.
Trigger the flow with When a task is completed.
Add a Condition to check if the task comes from certain bucket. You need to get the certain bucket id first.
Triggerbody()?[‘bucketid’] is equal to 8pezjluDYESvOAIRwwVQYMkAJxmM
Under if yes branch, create a task with needed value.
Then update a task to update the progress to “In Progress”.

Best regards,
Mabel