Products updating every night

Hi there,

We are retrieving all the products, which is this entity: https://shopware.stoplight.io/docs/admin-api/adminapi.json/components/schemas/Product
Everything is working as expected. Expect for one thing. We are continuously retrieving products, so using the „UpdatedAt“ field we only want to retrieve the products which were updated since a certain time, which is more efficient.
Unfortunately, we see that almost all the products update between 1 and 2 AM, which means we still retrieve all the products, instead of only the ones that really changed.

My question, why are all the products updated every night? Even-though we are not updating anything from our side.

Hope my question is clear,

kind regards, Ed

Must be a plugin or something, that updates your products. Many of my products still have the same createdAt and updatedAt date.