Please check if your tempDB is being shrunk too regularly?
Hopefully this is not the case in anyone's environment as shrinking tempdb is a risky thing to do and there should be no need for it. If tempdb bloats for whatever reason the SQL Server service or entire server can be restarted to safely bring tempdb back to its original size without ever shrinking the database.
You may have to check auto shrink property of tempdb as well....
This will not be a concern since we cannot set the auto shrink property on tempdb, even via model.
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