[FS#764] MT6721: Any traffic shaping results in crashes/stack traces

[LEDE Bugs]

The following task has a new comment added:

FS#764 - MT6721: Any traffic shaping results in crashes/stack traces
User who did this - dchard (dchard)

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This happnes under kernel 4.9.37 and I agree this is load depenedent. I am not using any QoS like SQM, but when I run an iperf3 server on the router itself, after a few seconds I got exactly the same kernel trace as in the first post. However I never seen a reboot of my device. 
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=764#comment2974