Naming a Synapse Pipeline activity "Pipeline" causes pipeline to fail

[viggotw]

NB! This is a duplicate of this issue. I wasn't sure where this issue would fit best, so I will leave it up to you to decide

What is the issue
Running a pipeline where an action is named Pipeline causes the run to fail immediately.

Steps to reproduce issue

1. Create a pipeline
2. Add a Synapse Notebook activity and name it "Pipeline"
3. Link it to the notebook and spark pool of your choice

Expected behavior
I would expect one of the following outcomes, in the given order:

1. It should not fail
2. It should report back a more helpful error message
3. It should be documented somewhere if "Pipeline" is a reserved activity name

Observed behavior
The pipeline run fails immediately with the following error message:

{
    "code": "BadRequest",
    "message": null,
    "target": "pipeline//runid/8fd22880-bbfe-41a9-b91d-8ce0fa3ef746",
    "details": null,
    "error": null
}