x-fake-data openapi numbers always fixed?

[dynnamitt]

Please help; I struggle with randomized numbers from a swagger schema:

ver: imposter/docker 4.7.0

# will always be 42 !
tinyNumber:
  type: integer
  maximum: 256
  x-fake-data: |
    Number.numberBetween '0','255'

# works fine, random number (as string) every request
tinyNumberAsStr:
  type: string
  x-fake-data: |
    Number.numberBetween '0','255'

In the examples there is no type:integer ;
https://github.com/imposter-project/examples/tree/main/openapi/fake-data