Slide navigation variable & trigger jumps to a random slide after a Results slide

UPDATE: 

We've identified that when we lightbox a slide, it's setting the Nav_Next trigger to go to the slide that the lightboxed slide would have gone to. 

Context: 
When a learner gets a question wrong a second time, we lightbox the slide with the relevant information, so the learner can make an informed answer on their third attempt. We have the Nav_Next triggers on the slide that is lightboxed, but we have a condition on the Show Nav layer on the Master Slide to only show the layer if the slide is inside the player frame (i.e. not lightboxed). 

Through some testing, we've found that even though this condition is set, its actually overwriting and LOCKING the Go To Slide triggers that are fired by the Nav_Next variable, so it fires to that specific slide regardless of when you fire it (the first time it fires again via the variable will always be the slide that it would have gone to in the lightboxed slide). 

We have found a way around it by adding the "If this slide is inside the player frame" to each Go to Slide when Nav_Next changes trigger on each slide. It seems that the variable + trigger combo gets initialised when the slide starts, regardless of if the layer is shown or the trigger is fired. Since its on the lightboxed slide, it appears to lock it in place, bricking the course from there onwards.

Still, the lightboxed slide should not be adjusting or locking other slides into a specific trigger if the layer or trigger was never fired.