Rotating object around multiple axes using glm::mat4

Question

I'm trying to apply multiple rotations around x,y,z axis to an object by using glm::rotate method but for some reason it only rotates around one axis and seems to be completely ignoring other rotations. Here is how I apply rotation:

glm::mat4 rotateTransform = glm::mat4(1.0f);
rotateTransform = glm::rotate(rotateTransform, this->rotation.x, glm::vec3(1, 0, 0));
rotateTransform = glm::rotate(rotateTransform, this->rotation.y, glm::vec3(0, 1, 0));
rotateTransform = glm::rotate(rotateTransform, this->rotation.z, glm::vec3(0, 0, 1));

return glm::translate(glm::mat4(1.0f), this->position) * rotateTransform *   glm::scale(glm::mat4(1.0f), this->scale);

the method returns modelToWorldMatrix which I then pass to my vertexShader where I perform standart calculation on a vertex:

vec4 vertexPositionInModelSpace = vec4(Position, 1);
vec4 vertexInWorldSpace = gModelToWorldTransform * vertexPositionInModelSpace;
vec4 vertexInViewSpace = gWorldToViewTransform * vertexInWorldSpace;
vec4 vertexInHomogeneousClipSpace = gProjectionTransform * vertexInViewSpace;
gl_Position = vertexInHomogeneousClipSpace;

So how can you apply multiple rotations by using glm::mat4 matrices?