Field access policy with relation field access cause compile error

[jiashengguo]

model User {
    id Int @id @default(autoincrement())
    name String?
    admin Boolean @default(false)

    companiesWorkedFor Company[]

    username String @unique @allow("all", auth() == this) @allow('read', companiesWorkedFor?[owner == auth()]) @allow("all", auth().admin)
}

model Company {
    id Int @id @default(autoincrement())
    name String?
    owner User @relation(fields: [ownerId], references: [id])
    ownerId Int
}

After running zenstack generate, it will shows the below error:

node_modules/.zenstack/policy.ts:15:90 - error TS1005: ':' expected.

15                     input, ['id']) || (input?.companiesWorkedFor ? (input?.owner == user)) || (user?.admin ?? null))

It misses the : null in the collection ex