TaggedEnum generics + optional field makes constructor arg disappear

import { Data } from "effect"
 
type FooBar<Type> = Data.TaggedEnum<{
   Foo: { prop: Type };
   Bar: { prop?: Type };
 }>;
 
interface FooBarDefinition extends Data.TaggedEnum.WithGenerics<1> {
   readonly taggedEnum: FooBar<this['A']>;
 }
 
const { Foo, Bar, $match } = Data.taggedEnum<FooBarDefinition>();