Multiple text entry fields reporting data to LMS

Hi Articulate Community,

This is my first time posting in the community and I'm hoping to get some help. I know this is an old thread, but thought I'd post from this as the scenario above is pretty much what I'm trying to achieve. 

We are implementing an LMS (Moodle) and I'm doing some testing as we need to report learner responses that are entered into free text fields to our LMS. There will be multiple free text fields on the same slide.

I've read through the above thread and the below article for assistance - https://access.articulate.com/support/article/Storyline-360-How-to-Send-the-Value-of-a-Variable-to-an-LMS

I've been successful in getting the responses to report back to the LMS, but the issue I'm having is that I'm not able to successfully 'hide' the short answer question slides. I've set a new trigger to submit the interaction on the short answer question slides when the timeline starts on the slide, but when previewing it, I get the pop up 'Invalid Answer. You must complete the question before submitting'. The submit trigger is firing before the adjustable variable trigger, so it thinks the question isn't answered. The only way I've gotten around it is to set the submit interaction trigger to fire when the timeline reaches 0.02, but this means the learner will see the question slides.

I've attached my test file, any assistance is greatly appreciated. I'm sure there's something simple I've missed.

Thank you in advance.