KevinYang21 commented on issue #5079: [AIRFLOW-4285] Update task dependency 
context defination and usage
   Thanks @ashb for clarifying! I'll do a quick deep dive later today on this. 
From what you described, my understanding is that basically our problem came 
from [how we sort the queued tasks when 
 So when we trigger tasks we always let those upstream tasks to take over the 
open slots and leave the downstream tasks in the queue_tasks. I think the 
one-line fix you had is needed logically but I'm not 100% sure if that is 
solving the root cause for us. In fact the behavior strikes me as expected, 
since we don'g really set priority on those tasks.
   All above is my hypothesis, I'll validate when I got a charger for my 
laptop--docker burns out battery too fast...

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