There is a bug I've noticed that may not have been found as no one uses this perk. But if you are sprinting when surge for void walker turns of, you continue the sprint animation but only go at walking speed. It's quite annoying as I have to stop sprinting and wait through the cool down before I can start again.
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I would suggest adding the #bug tag to this, so it is logged with other bugs. Found a post back in December about this, but seems they just archived it and let it sit.