Columnstore Table empty after seemingly successfull cpimport

After a successfull cpimport, the table seems to be empty.
Select count(1) from table and slect * from table limit 100; both indicate that the table is empty.
We tried loading the data again with the same result.
After stopping and then starting the system (mcsadmin stopsystem/mcsadmin startsystem)
The table shows the correct number of rows and query against it return data.
Any idea what might cause this?
I dont think we ever experienced that in our testing before.