Batches "lost" classification data

Hi experts,

we have a bigger issue in the EWM system.

We cif batches from ERP system (ony in the ERP system batches are created), includes some classification data like best before date, vendor batch etc.:

Now the batch has this data also in EWM (Ishich was correct, checked afterwards).

Since yesterday, all the data is missing, so we have an "empty" batch, only the of last goods issue, status and the vendor are filled:

I checked for the movements for this material/batch in EWM, only Stock removals, posting changes, internal movements, no GI posting...and nothing on the 05th of August:

Why is the batch changed? What happened here? Does anyone has an idea?

Problem is - with the missing best before date we pick the wrong stock...

Thanks

Michael