telescope moveaxis has unexpected ranges for Rate

[punkto]

I have tested this issue with ASCOM Alpaca Simulators version 0.5.0 and 0.4.0 on Linux. If I start the simulator with default parameters (except for the port). When I do:

curl -X 'PUT' \
  'http://localhost:11111/api/v1/telescope/0/moveaxis' \
  -H 'accept: application/json' \
  -H 'Content-Type: multipart/form-data' \
  -F 'Axis=0' \
  -F 'Rate=9' \
  -F 'ClientID=0' \
  -F 'ClientTransactionID=23'

I get as response:

{"ClientTransactionID":23,"ServerTransactionID":8,"ErrorNumber":1025,"ErrorMessage":"MoveAxis set - '9' is an invalid value. The valid range is: , 0 to 6.666666666666667, 10 to 20."}

I have tested other rates to assert that the range is enforced. If I change the telescopes Slew Rate to another value (for example to 10 deg/sec) the range is updated to 0 to 3.3333333333333335, 5 to 10.

I have tried to search in the documentation or code for a reason to this behavior with no luck. Is it OK?

Thanks in advance for your time.