Timeline pauses when I'm using lightbox

Hi,

I have developed a training program using a lightbox to display questions and result pages. I want to send users to the "end page" when they went through the 4 sections. I have 4 variables checking if the users have accessed the last page of each section. I want to use these variables as a condition to send the users to the "end page" of the training program.  But, when I close the last page (from the lightbox), as the timeline is not starting or ending, the trigger is not activated.  I have created an animation loop modifying the value of another variable to use the "Variable changes" trigger but the timeline seems to pause when I close the lightbox so the value doesn't change any more. I'm not able to find a way to achieve this. I tried a lot of things, like adding the trigger to the slide master, but nothing worked. I have prepared a light demo I'm sharing. You will notice that the variable stops changing after you click on 2 buttons opening the slide in a lightbox. I don't understand why it is happening after 2 clicks instead of the first one. We really need to be able to add triggers to the lightbox's close button. Your help we'll be really appreciated.