I have experienced this before. It was resolved by switching to a different size of the jetway, or moving it closer to the aircraft. For me, this happened when the jetway thinks it couldn’t attach to the aircraft, or at least that’s what I think was happening. By increasing ( or decreasing) the jetway size, it solves it for me. It’s also worth noting that I have experienced the jetways taking that shape for a few seconds after I land and activate a parking spot, but as I near the gate, they take the proper positions ( I figured this part is normal as it always corrects itself?)