Mone
just in case you're interested, on a page including the Lightstreamer library, you can reproduce the issue using this code:
[SYNTAX=JS]require(["Executor"],function(Executor) {
var r = Executor.addRepetitiveTask(function() {
console.log("Should run only once, no exception should appear afterwards");
},100);
Executor.addTimedTask(function() {
Executor.stopRepetitiveTask(r);
},100);
});[/SYNTAX]
