Calendar airdate issues

I’ve noticed something weird with the calendar for 2 shows I watch.
They had future airdates that were moved up a week, while the dates on the episode pages are updated, the calendar is still showing the previous dates… The shows in question: De Verraders & Politierechters

I doubt it’s a cache thing on my end. For Politierechters it’s been like this a few weeks in a row (even sometimes showing 2 episodes, the correct one at the right time & the one for the week after at midnight). The episode of “De verraders” has only been updated last week. It’s like this on web & iOS