We’ve just bought a cybex solution G I-fix as my DD is now 106cm and too tall for her joie baby spin 360. It was highly rated on Which and seemed like a good option. I’ve installed it following the instructions (isofix and the adult belt) but I find that the back of the carseat doesn’t stay against the seat when my child leans forward, the whole seat sort of tips forwards at the hinge - I’ve attached a photo so you can see what I mean. Is this a fault with the seat? Any advice appreciated!