Why does my moving platform somtimes rotate?

Here's what it is sometimes doing.

The part has a BodyPosition and a BodyGyro.

Here's the BodyPosition.

Here's the BodyGyro.

This is my movement script.

local part = script.Parent
local A = script.Parent.Parent:WaitForChild("A")
local B = script.Parent.Parent:WaitForChild("B")
local dly = 5

A.Transparency = 1
B.Transparency = 1

wait(1)

part.Anchored = false


while(true) do

    part.BodyPosition.Position = A.Position

    wait(dly)

    part.BodyPosition.Position = B.Position

    wait(dly)

end