FeatureLayerCollectionManager.create_view() crashes for FeatureLayerCollections with multiple layers (2.4.0)

[Wouter-van-Adrichem]

The method FeatureLayerCollectionManager.create_view() crashes for FeatureLayerCollections with multiple layers in version 2.4.0. I checked this for a feature service with only one layer and then the function worked fine.

The error originates in fs_view.manager.add_to_definition(add_def, future=True).result() in line 2972 of arcgis/features/managers.py . The error seems to originate in the REST API (as opposed to the ArcGIS API for Python). The error message is "Unknown Error", while I can see another message is "Error applying service definition" when I am debugging.

In the summary of FeatureLayerCollectionManager.add_to_definition() I see "For layer level modifications, run updates on each individual feature service layer object." This could be the problem?

I have a workaround for now. I copied the method and made my own implementation. Instead of adding all layers to add_def I just loop over all the layers and call fs_view.manager.add_to_definition(add_def, future=True).result() for each layer seperately.

It took me quite some time and frustration to first find the bug and to find a workaround.

P.S.
The typing for FeatureLayerCollectionManager.create_view() is incorrect, and I have seen this incorrect for a lot of methods as well. The typing for the parameter view_layers should be view_layers: list[FeatureLayer] instead of list[int] and view_tables: list[Table] instead of list[int].