Currently Cascading LookApp uses client side rendering (JSLink) in order to work.
However, for calendar lists (event types in general) or survey list ignores JSLink. This causes Cascading LookApp to render as regular SharePoint lookup fields.
We reached out to Microsoft for guidance and workarounds, however they did not provide any.
Until they Microsoft provides us with a solution, Cascading LookApp cannot be supported in these use cases.
The KWizCom team apologies for any inconveniences.