Hi @awdoiunauiwdn,
Welcome to the GLFW forum.
Are you using the GLFW_TRANSPARENT_FRAMEBUFFER window hint or the glfwSetWindowOpacity function for this?
See GLFW: Window guide
Additionally, when you say the window isn’t my entire monitor’s resolution do you mean going fullscreen?
I am not sure what might cause this issue but it could indeed be a driver problem, though I if it is a fullscreen window then I’m not sure transparency is supported when fullscreen.