In that case, when you set the angles on the entity, the engine has to apply it to the entity’s transformation matrix. When you get the euler angles again, it has to calculate them from the matrix so it won’t be exactly the same value that you have set.
I also recommend against checking against localEulerAngles as they can flip when one axis is more than 90 or less than -90. I you are constantly setting the rotation via euler angles, I would keep a local set in the script and apply it to the entity every frame. It’s a lot easier to control and check bounds.