Won't Get Fooled Again - S2-E15
Trivia: The following can be seen in this episode, though they only occur in John's head due to being in a Scarran induced delusional state. After John kisses Logan-Rygel on the lips, he runs up the stairs carrying Logan-Rygel while shouting, "Let me show you how I crash landed the Farscape module!" and when John swings Logan-Rygel around imitating Farscape 1's flight, the left hand/wrist is pulled from the sleeve and we can see the puppet's non-existent arm. Later, when John's mother comes to see him at the hospital the boom mic dips into view above her. Then when John walks into Logan-Rygel's office while everyone is there, we can see the puppeteer's movement on the floor in front of Rygel.
Chosen answer: It's never explained. John mentions a theory that his less technologically developed craft simply interferes with the wormhole less than the "superior" Vipers, but they never make a concrete determination on that point. But we also have to take into account the fact that Moya traverses wormholes with no ill effect as well.
Garlonuss ★