Different values for ES and AE (AME BrigeTalk)

Hi! 

This is the code for checking if the render is done. I run it throught ESTK (After Effects) and wait when the render stops. But the problem is when I run it through ESTK (chosen ExtendScript Toolkit CC) it works fine: when the script starts, it writes true values in the console. BUT if I run it throught AE (chosen Adobe After Effects 2020) it just catch only the first "callback", only the first value of "isBatchRunning()". If I pause or stop the render, nothing happens, only the first value of "result" is displayed in the console. What am I doing wrong? Thanks!

var isRendering = true;
var myResult;
var bt = new BridgeTalk();
bt.target = "ame-14.0";
bt.body = "app.getEncoderHost().isBatchRunning()";
function infoFromAME() {
    bt.onResult = function(msg){
        resultFunction(msg.body)
        }
    bt.send();
}
function resultFunction (result){
        myResult = result;
    }
while (isRendering) {
    infoFromAME()
    if (myResult == "true"){
        $.writeln('render is in progress');
        }
    else {
        $.writeln('render is done');
        }
}