Just wondering if anyone else has had problems with the bugaboo fox 3 stroller seat. I have recently moved from the basinette to the seat and on 3 occasions now the seat has suddenly tipped with my child in it (luckily they were strapped in). This is despite me ensuring it was locked in to position. It makes me really nervous to take the pram out. I plan to contact John Lewis where I bought the buggy- but it’s almost a bit annoying it’s happening intermittently as it is hard to prove.