Bootstrap dropdown and form onshow

I have a bootstrap dropdown in a form. However form onshow event is triggered every time where click the dropdown. Is this a bug?

Thank
Teo

I was able to reproduce this. Here is a workaround:

In BASIC:

Function Form1_onshow(event)
  If event <> undefined Then return

In JavaScript:

Form1.onshow = function(event) {
  if (event !== undefined) return;

I have this same problem. Not sure how to apply your solution. My onshow cocde is:

    Form1.onshow=function(){
          drpFlavors.addItem("Vanilla")
          drpFlavors.addItem("Chocolate")
    }

Did you try this?

    Form1.onshow=function(event){
          if (event !== undefined) return;
          drpFlavors.addItem("Vanilla")
          drpFlavors.addItem("Chocolate")
    }