Relations are not being saved after form submit

We are not using CRUDViews.FormEngineView, we use FormEngineViews.FormEngine so we can work with custom screen elements. (Solution taken from here).

We use RelationshipFactories.createRelationshipDataProvider(). We don’t use DeepLinkingFactories.createSagas(), I’ve added it for testing and it does not change anything.

To make sure our sagas and middlewares don’t break anything I disabled all of them. Also didn’t help.