A race condition exists where a track notify message comes into asapi_msg_process. If the cache entry has already been deleted, and another track notify delete comes in, the cache entry will be created with wrong information.
Don't create a cache entry at all, if the operation is delete.
commit 3d33c10e172b69a989304cc57199e2c714ae4059
Author: Alex Jones alex.jones@genband.com
Date: Mon Oct 16 12:39:59 2017 -0400