Siri playing wrong radio station (NPO Radio 5 instead of NPO Radio 2) on iPhone

Since yesterday Siri doesn't play NPO radio 2 when I ask her to play this radio station. She plays NPO Radio 5 instead. It has worked fine until yesterday.

[Re-Titled by Moderator]

Original Title: Has Siri developed dyscalculia? When I ask her (in Dutch) to play NPO Radio 2 she plays NPO Radio 5.