Shapeoko Wireless Controller Issues

For a number of months I used the Riki 2.4ghz mini wireless keyboard to control my CNC and it worked great…that is until the last few months. When I try to use the controller now it limits how far I can go in any direction forcing me to stop and then re-press the button to control movement. Does anyone happen to know what might be happening and a fix for this?

Perhaps key repetition rate is too fast? Or the keyboard battery is nearly dead & needs replacement or recharging?