... just a minor thing
To compensate the top-heaviness of the JU88A-1 while landing you adjust the elevator in connection with the flaps. Therefor actually the lever of the landing flaps should be set to position "Höhenflosse und Landeklappe Aus".
I get the impression that the flaps incorrectly fully retract in the position "Höhenflosse und Landeklappe Aus"... ...
Happy landings
Varrattu