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SteamVR random performance drops?

Currently i'm working on a VR project in UE4.11 Though as we started to optimize the scene we noticed that even though the "optimised" level ran buttery smooth at a solid 90fps, occasionally the game seemed to have random moments of bad performance for about a second every 10 or 15 seconds. I have managed to "capture" a performance drop using the profiler, though i cant seem to figure out what it is exactly what causes the performance drop from this data.

Here is the ue4stats file if it is of any use.

https://www.dropbox.com/s/deyg8gqcl68diy3/VrTest01-Windows-22-05.14.40.ue4stats?dl=0

Product Version: UE 4.11
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asked Apr 22 '16 at 03:48 AM in VR

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MissStabby
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