JavaScript/TypeScript - Callback not removed, why?

Colleagues, I can prove with logs that removing listener in some public component does not work. First, I see the listener is still called, second, I never see second console output, which puzzles me even more.

const scanListeners = []...function removeListener(callback) {    console.log("About to remove listener")    scanListeners = scanListeners.filter(listenerCallback => listenerCallback !== callback)    console.log("Listener removed")}

Could this be explained with some JavaScript specifics? I am not a huge expert in JS but still some years of work and I still cannot explain what happens.

BTW the component is invoked in ReactNative environment, like this:

const listener: Component.callBack = (code) => {    processCode(code)    dispatch(fetchList(code));    try {      Component.removeListener(listener);    }    catch { }  };

P.S. Listener adding code:

function addScanListener(callback) {  const listenerAlreadyExists = scanListeners.some(listenerCallback => listenerCallback === callback)  if (!listenerAlreadyExists) {      scanListeners.push(callback)  }}