Thanks for your inputs so far. Reporting wise i did what was possible from my side. To get a better picture: The MCP was working fine, no blanks, no frozen digits. All modes selectable and responsive. The flight director did not command the roll. It started after the overtaking passed by but unfortunately i could not identify the type. What i can say is that this particular jolt felt very strange. To smooth for a hard wake and in my opinion not enough to kick out the autopilot at a sudden. Never felt something like this before.
hb