Validation working at first (real-time) and not working later

Hi,

our log gets this:
2022-09-13T13:03:20+00:00 INFO Success: VAT ID is valid (Country: [SI]; VAT ID: [85170054]; Company: [AGROMEDICA]; Method: [soap])
2022-09-13T13:03:23+00:00 INFO Error: VAT is not valid (checkout) (Country: [SI]; VAT ID: [85170054]; Company: [Agromedica]; Method: [])

So first validation (when inserting VAT number) is working OK and validating true. Then when you click to complete the order the validation does not go through. As you can see in the log, Method is empty: []

If I try to set validation to cUrl or Simple, both validations (real-time and later on click) return false. Only SOAP is working in real-time validation.

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