I had a SOB (some other brand) that did the same. Knotted up by my nephew who I left shove the cord in one time and I couldn't pull it out the next.
I wound up having to remove the interior panel by the service entry (remove staples and nails) to get the cord untangled.
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.
Days Camped: '17=30 ☼ '18=51 ☼ '19=58 ☼ '20=83