Corsair and Cats question

Is it normal that when you free look around you while flying corsair or f9f, it will start to pitch downwards, most planes i fly do, but these 2 will actuly start diving from a 20 degree climb
If you wise to view video you can view it at its bug report
https://community.gaijin.net/issues/p/warthunder/i/iXoQ2wM4HIE3