Deployment pipelines totally bugged?

Hello, I am trying to use deployment pipelines to deploy my data pipelines and notebooks between my dev and my preprod environments.

I have set up the rules to change my bronze lakehouse (default lakehouse) between the two environments.

For some notebooks the change isn't taken in account, the dev lakehouse still appears as the default lakehouse.

For some others I have zero default lakehouse appearing.

 I also have the problem for one: I made a mistake in the GUID. Despite changing it in the deployment pipeline, it's always this one that is appearing.

I have tried to suppres this pipeline, create a new one. On one of my account, I don't have the possibility to create a new deployment pipeline (stuck on the deployment pipeline welcome page). It works on the other account. But despite reacreating everything, I still have the issues, including the mistake with the GUID from the other pipeline.

What is happening?