I pegged. It at the caravan but not the sides or front. Tube looked fineAre you pegging out before you inflate it, or is the tube twisted in its sleeve?
im sure the pressure is correct ( as per pump )If the tube has crept down the sleeve it causes ours to bend-deflate open move close the zip and reinflate. Never open the sleeve with the bladder inflated. Or have you got the floor cross ribbons in place and clipped together to keep width correct? and of course are you pumping it up to the correct pressure?