Huawei Mate SE has a screen timeout (enters sleep mode) after only 8 seconds regardless of which option is set in settings under Display--> Sleep. Whether it be 15 seconds (the min.), 10 minutes (the max.) or Never, the phone always enters sleep mode after just 8 seconds. I'm so frustrated, I even tried entering Developer mode looking for a way to fix this, but no good. Please help. Thanks.