Hello ! 
I’m glad to be able to help you. I had a similar problem is the solution was to change the USB cable that connects the remote to the Samsung S2 tablet. it is also necessary that your USB cable must be connected in the part below the remote control and not the mini usb which is on the left of the remote control. since then, I have never had a disconnection. the quality of the cable also plays a role. a usb 3 is I think recommended.