Added record not visible if parent node is expanded

Hi,
I have an issue using 'updateData' API to add a new record. In some case the record is not visible in the pivot after calling updateData (although the aggregate value sum is correctly updated).
It seems to happen when:

• there are more than 100 records in the data source
• there are at least two level of aggregation (for rows)
• there is at least one node expanded (no matter whether the expanded node is the one with the new record or not). 
• the added record has a value (for the lower level) that is not yet in the pivot.

I prepared a JSFiddle in which you can choose the number of record in the data source. 

• 'Add exist product' works fine, no matter the number of record or the expand/collapse state.
• 'Add new product' works only if you never expand a node or if the datasource has less than 100 records

Could you please fix it?
Thank you!
Best regards,
Ilaria.