I do not remember anything like this. Could it have been a dream?
Perhaps some confusion with deleted scenes or photos of the Wampa attacks on the Tauntauns inside the Hoth base, or maybe a comic?
Or maybe another sci-fi film or show that has become part of your Star Wars memories?
Have you had any luck in finding another 1993 German widescreen edition of Empire Strikes Back on video again to see?
I hope you find an explanation.