We have sent our partner an email inquiring about the reason for the current API limitation. Over a year ago, they granted us access to the unlimited version of API v2, as version 1 of their API would eventually be discontinued.
We are currently still awaiting a response.
As a good temporary workaround, you can try restarting your KNMI app at the moment it starts displaying “0” values. Once the API issue is resolved, this flow will no longer be triggered.
Please do not send us any more reports regarding the “0” values shown by the app.
For all other issues, please post your problem on the forum first, and we will request a report if needed.
We apologize for the inconvenience.