Adobe Captivate 2019 Quiz with time limit and bookmarking

Hi every one,

I hope someone better understands the issue I'm illustrating here and help me with a possible solution.

I have a Captivate 2019 Quiz with a time limit set on the entire quiz. I have created some user variables to control the quiz timing, and have used the "Execute JavaScript" action to show a count down timer on every question slide of the quiz. If the time limit is reached while a student hasn't finished answering all the question, the quiz jumps to the result slide where the student is shown the score obtained  in the time limit, and can report the score to our custom LMS. Up to this point everything works as expected.

Now here is the big issue I'm running into: I have a requirement that bookmarking should be turned on to take into account some unexpected events. For example, let assume there has been an abrupt internet disconnection or the student navigates away from the quiz by mistake while taking the quiz. When he/she returns back to the question, the quiz should resume from where they left. Again, this works perfectly fine, but the count down timer stops working even though the student can carry on with the quiz. I want the timer to keep working on resume of the quiz.

Is there an easy way to keep the timer to continue counting down when a student resumes from where they left taking into account the time that has elapsed during the interruption? This is the main issue I have been struggling with for a couple of days now. I have searched the internet, but I haven't found anything that addresses the current issue I'm facing. I should mention that I'm  new to Captivate and have no enough experience to tackle advanced issues like the one I'm having.

I would really appreciate if any one can guide me through and put me into the right direction.

Thank you.