I'm very sorry for this strange behavior that you're experiencing. If you could, please give me the complete model code for this device, as this appears to be partial code; that will allow me to help you most accurately.
I have a question regarding remote control. I have an issue with my remote control while I'm using youtube or netfilx app on my tv. TV stops responding to the remote control(I cannot use any of the buttons on it) and i have to wait more than 3 minutes to get tv responds to anything. When it starts responding it's not smooth but it catches maybe two button clicks out of five I would say. Is that just my tv or maybe you have the same issues? I also noticed that when i click a button on my remote control tv led is not flashing, its like tv doesn't see that.