Intermittent Performance Spikes, high time in Manipulators

Had a major stutter on 7 mile ILS final into 23L, Dusseldorf EDDL at night, followed by a CTD. A32NX experimental mod, FBW livery.
Also had the 30 second slow-down happen on the third-to last leg of the Balkans bush trip, over water. C172.