This is a known bug with the version of Razer Nexus preloaded on the Razer Edge. In certain situations, the Kishi V2 Pro controller will stop working. This can persist even if Razer Nexus is uninstalled or disabled.
To fix this issue and prevent it from occurring, install the latest version of Razer Nexus from the Google Play Store. Then update your Razer Kishi V2 Pro controller's firmware from within Razer Nexus. The controller should work perfectly again.