Hierarchical Tree View + @odata.draft.enabled + Flexible Column Layout – Cannot create drafts

[thisisevanfox]

Hi CAP Community,

I'm trying to combine a hierarchical tree table with draft-enabled entities (@odata.draft.enabled) in a Flexible Column Layout app built on CAP + Fiori elements.

No matter which hierarchy annotation approach I use (@hierarchy annotation or the manual approach), clicking Edit on the Object Page fails with two different errors depending on the approach.

I've put together a minimal reproducible example based on capire/bookstore repository:
https://github.com/thisisevanfox/tree-table-draft-fcl

The full problem description including both error messages, setup instructions, and observations can be found in the README of the repo.

Any hints or pointers would be greatly appreciated!

Kind regards,
Johannes