I partially solved my problem by twisting the black cable "sleeve". It seems to have a natural 'directioness", so by turning it a bit, it now naturally want to buckle upwards and does not get caught.
BUT now I have a different problem -- I cannot find a good way to route the filament as it gets tangled up with the -- you guessed it, cable bundle. I managed to almost print a complete simple model by printing with the "lid" up, and hand guiding the filament to prevent it from snapping. But obviously this is not a reasonable solution if the print time is longer than a few minutes !!
P.K.