Thanks Jean. I've commented it out in the code for now to stop it's minimal spam to the console. It also isn't causing the spikes and has taken the weird fps pulsing out of my mobile builds.
The other cause of weird pulsing, as I was deep profiling, was the HotweenPlayById. the line Debug.log("finished"); was causing it. I commented that out as well.
Hope I'm not breaking Christmas O_O
Thanks for all your neat work!