Gotchas

Hard refs to flow assets can cause crashing

This issue affects at least FlowGraph 1.6 and earlier.

If you need to reference a Flow Asset, you may need to use a Soft Object Pointer. Otherwise the asset may cause a warning and a crash

Warning LogLinker [AssetLog] X:\Path\To\Asset.uasset: VerifyImport: Failed to find script package for import object 'Package /Script/FlowEditor'

Another workaround for this is to update Flow.uproject, and change the LoadingPhase for FlowEditor to PreDefault.