There is issue that game consider flight direction after split based on thrust only, but, many ship which have almost equal thrust into multiple directions, than have problem, that game cannot decide what is correct flight direction and sometime after split has splitters multiple random flight direction, even if they are completelly the same.
Walt is definnitely aware of this. Let him to figure out some solution (like weapon/thrust base flight direction logic), anyway next update will come with many new flying features, so being patien is the best 😃