Blended data - date granularity doesn't work

Hello, 

I've blended to data sources by user id.
One of the dimensions is creation_date, which works fine when the granularity is set by date, but when it is set to month-year it isn't working. 

Captura de pantalla 2025-06-26 a la(s) 12.18.37 p. m..pngCaptura de pantalla 2025-06-26 a la(s) 12.19.48 p. m..png

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