G-SPOT, exactly and I have already written some very pissed off emails to Mr.Honeywell and Mr.Cessna.
Thats the exact wording of Mr.Cessna:
Cessna Sovereign - EPIC Phase 5 Alert
Cessna has received reports from several EPIC Phase 5 equipped Model 680 operators of a moderate rate autopilot nose down pitch command during autopilot coupled ILS approaches. These events have resulted in deviations below the glide slope. In all cases these events were readily arrested by the pilot using the control wheel autopilot disconnect button. Cessna is working closely with Honeywell to assess the issue and develop a solution. Until a solution is provided, Cessna recommends autopilot coupled ILS and LPV approaches not be conducted on Model 680 aircraft equipped with EPIC Phase 5. The vertical deviation display should be carefully monitored when conducting ILS and LPV approaches using flight director guidance. The flight director should be disregarded if there is disagreement between the flight director command and vertical deviation display is observed. This recommendation will be followed up with an AFM temporary change establishing this as a limitation.