I was wondering if anyone could explain more how the deletion schedule for Q-items (possible under 'Mass Delete') in a wikibase.cloud project works in relation to sparql queries that might involve those Q-items? By this, I mean that I have been experimenting with mass import/update scripts and sometimes found it necessary to delete a block of Q-items generated by those scripts. Yet shortly after when I run sparql queries those deleted Q-items still show up in the results even though their pages are deleted on the wiki. For a few lexical items or Q-items this 'time lag' seems to last on the order of a few minutes, but for bigger blocks (even as few as a dozen) somehow the ghost results still appear in the sparql query. 

This is messing up my scripts.

Matt