box can start rotating when colliding another box for no reason

[DiuDono]

I have 1 red box moving between 2 massless white boxes along the z axis. I have not rotated any of the boxes, and I ensured the red box doesn't hit an edge of a white box. The red box starts rotating on collide, and also collides 4 times with each white box on a single bounce. The collisions are supposed to have restitution = 1 (elastic) and friction = 0