"ble_uart" : Unhandled promise rejection

There is the need for a additional try catch to handle Uncaught Error: BLE task DISCONNECT is already in progress

bleSendJS = function(_id, _cmd) {
    console.log('s');
    try {
        NRF.requestDevice({ timeout: 5E3, filters: [{ id: _id }] }).then(function(device) {
            console.log('f');
            console.log(device);
            return require("ble_uart").connect(device);
        }).then(function(uart) {
            console.log('c');
            var data;
            uart.on('data', function(d) {
                data += d;
            });
            uart.write(`\x03\x10(${_cmd})\n`).then(f­unction() {
                setTimeout(function() {
                    uart.disconnect();
                    console.log('output:', data);
                    console.log("Disconnected");
                }, 2000);
            }).catch(function() {
                console.log("Promise Rejected - disconnect");
                uart.diconnect();
            });
        }).catch(function(e) {
            console.log("ERROR:", e);
        });
    } catch (e) {
        console.log("ERROR:", e);
    }
};