[BUG] Nested Dynamic Block Reduced Output Downstream Block Executed Multiple Times

[FaisalDoowii]

Mage version

0.9.70

Describe the bug

when I set dynamic child as a dynamic block (let's call it nested dynamic block), then I set the downstream block of this nested dynamic block to reduced output, the next downstream block were executed multiple times, I think the number of execution is the same as the max number of child of the nested dynamic block. To avoid this, I create an intermediary dummy block that only accept the reduced output and return it immediately. After that, I set the actual downstream block as the downstream block of the intermediary dummy block. This way the intermediary block is executed multiple times while the actual downstream blocks are only executed once.

To reproduce

1. Create new pipeline
2. Create a new block A on the pipeline, set it as dynamic block and make sure the output is more than one element to ensure the bug reproduced.
3. Create a new block B as the child of block A, set it as dynamic block and make sure the output is more than one element to ensure the bug reproduced.
4. Create a new block C as the child of block B, set it as reduced output and make sure it has an output
5. Create a new block D as the child of block C. This block will be executed depends on the number of max child of block B

A (Dynamic) --> B (Dynamic, Dynamic Child) --> C (Reduced Output, Dynamic Child) --> D (this is executed multiple times)

Expected behavior

Block D should only be executed once.

Screenshots

No response

Operating system

No response

Additional context

Slack Thread