Arknights Vanishing bug?

If someone could help me figure out if its something wrong with bluestacks or the game thatd be wonderful. Dragging slightly too hard in one direction with the mouse seems to just make the entire roster or shop vanish with no way to bring it back aside from just opening the game again

https://preview.redd.it/vairlans99m61.png?width=1477&format=png&auto=webp&s=ed452630f1f8cc9cbd5e981a175102d6d24aec38