My CPU usage is jumping everywhere for no reason?

I have happily used Studio One 3 for nearly a year now and I love it. I use Windows 10 and when I logged on today the CPU usage on studio one is jumping around everywhere from 10% to 50%. I have never had this problem before, it would always stay around the 10% mark.

This is extremely aoying and seems to stop midi playing when switching tracks with low latency instrument monitoring on. Is there any way to fix this apart from wait for a new update? My CPU is easily good enough to run everything and this is ruing projects I have done before with no problem.

I can't believe these problems are still going on, I seem to hear about CPU problems with this software every other day but this is the first time I have encountered them myself. VERY frustrating for such an expensive bit of software.