Hi @sorosoro,
This is due to a problem specific to Collection Rel Type being displayed as a query combo box. The system automatically creates and assigns a pick list for this field, and when attempting to retrieve data (i.e. populate the query combo box field), it is also trying to scope the pick list items.
The system’s attempt to scope the pick list items is a new behavior introduced along with system enhancements for collection relationship WorkBench uploads and scoping of front end requests in general.
This is written up on GitHub, where I’ve just left a comment reporting your encounter with this. We hope to have this resolved soon, let me know if you have any further questions.
Thanks for reaching out!
– Bronwyn