Array fields always as any if type specified as array

[hlavavit]

I got this kind of property on my object

        permissions:
          type: 
            - array
          items:
            enum:
              - DEBUG
              - EDIT
            type: string

it end up being generated as

  permissions: any[];

but when i change it to

        permissions:
          type: array
          items:
            enum:
              - DEBUG
              - EDIT
            type: string

it suddenly works and generates as

permissions: ("DEBUG" | "EDIT")[];

Happens with objects as well not just enums.

And it happens with json format as well there it works with "type":"array" and does not with "type":["array"]

Its needed for nullable arrays for example "type":["array","null"] since nullable has been removed with 3.1