Mecool KM2 Plus Wake Up Problem

I’ve been using my KM2 Plus for a couple of weeks and whilst I’m happy with it, I think I’ve found a problem with it, and that’s getting it to wake up after it goes into standby. The red light is on but it doesn’t matter which buttons I press it won’t wake up until I switch it off and back on from the mains. Has anyone else experienced this or is it something I’m doing wrong?