Filters using model as a data source

Hello!
I'm using a model as a data source in order to build questions and use them in a dashboard.

Before i add the filters to the dashboard i set as category the fields that i would like to use as filters:
image
Then, i added the filters but the values don't appear as a dropdown list as you can see in the following picture:

Am i missing something or should i do in another way in order to have the values as a dropdown list in the filters?

Thank you in advance!

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    "user.language": "en",
    "user.timezone": "UTC"
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      "jdbc-driver": {
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        "version": "2.7.6"
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    },
    "run-mode": "prod",
    "version": {
      "date": "2023-02-19",
      "tag": "v0.45.3",
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how many distinct values those fields have?

Hi Luiggi,
Landlord size 3, landlord type and upgraded 2 both.

Have you forced the filter values refresh?