We also use only synonyms when accessing data from a different database. Use of a synonym for objects in a different database is required and the objects can only...

Yep, that's it.  Thanks

No, we are not running DBCC DROPCLEANBUFFERS between test runs, but this occurs consitently.  We have multiple SPs where this occurs.  The SPs use a param 15 times.

It is generally faster to drop, copy data and then recreate the indexes than trying to do mass inserts with indexes intact.