I've noticed over the past few autotunes that peak 69.0 is not the most dominant one anymore. Instead its peak 219.0. Additionally, the peak shapes of the PBFTA fragments are not great either. Attached is one of these autotunes. Any ideas what could be causing this? The PBFTA levels seem in the bulb seem to be ok so perhaps the EM multiplier needs replacing? At the last service this was suggested.