Too many unique values in Pivot, but same works with Group By node

Groouping on the sam columns and counting unique id-s works with Group By but gives this in Pivot:

​Skipped group(s): ad_id groups: "bump" cause: "Group contains too many unique values"

The unique values per group are way below 10,000 which is the limit.

Hi manu5,

Could you please post an example of your workflow?

Cheers,

Roland