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Last tested: Oct 22, 2018
This can be caused by commented out liquid in a PDT - commenting in LookML does not prevent that text from being evaluated in SQL. This can cause a different hash to be applied to the PDT in the admin panel, preventing its build events from showing up despite them running properly.
PDTs in this state work fine, and you can remove the commented out liquid from the affected PDT and push to prod to have it appear properly.
It can also appear if the derived table is defined in LookML but never queried from an explore
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