Quest Blueleaf Tubers is impossible to complete

[Alaric]

When attempting to complete Blueleaf Tubers quest you are supposed to use item Crate With Holes inside trench in Razorfen Kraul to summon pet that will then reveal nodes from which quest item can be looted. However attempting to use the Crate inside the trench causes error message "Requires Nearby Tubers" to appear and no pet is summoned.

 

How to repead the bug.
Enter trench in Razorfen Kraul with Blueleaf Tuber quest active and use Crate with Holes.

[Healstrike]

It's exist in dungeon, but seems you need very specific spot to activate. 

I see 15 Blueleaf Tuber and 1 TEMP Nearby Tubers in database. Probably second gameobject needed to release small pet, but I really don't remember location. Maybe one of developer/moderator can teleport on that object and provide screenshoot.