Web version, slicers are disappearing

Hey peeps,

in the webversion of a report slicers disappear. These are date slicers. Also the cards representing the relevant dates are empty.

Can anyone help?

- have already reuploaded dataset

- dataset is successfully connected to GateWay

- desktop version is working without problems

Screenshots below:

Desktop-Version (what it is supposed to look like)web-version (what it looks like)