Conditional slide showing when it shouldn't be
I've built a "Jeopardy" style study guide for our software users. There is a question board of 25 questions they can pick in any order. They select a question, it takes them to that slide, and if they get the answer correct, it displays a big "Correct!" graphic, waits 3 seconds and then jumps back to the question selection board. If they get it wrong, it goes to the next slide which has a more detailed explanation of why they got it wrong, then when they're done reading they click anywhere to jump back to the question board. They can only see those detailed slides if they get the question wrong, or the time limit to answer (16 seconds) is met.
It works great...
Except every now and then, if they get the question correct, it will show the 'correct' graphic, but then jump to that next slide with the wrong answer explanation. The user still gets the proper points for the question, and it logs as a correct response.
The Advanced Actions I'm using to make this happen are extremely simple, and this one is used on all question slides (Slide 3 is the main question selection board):

I've checked every parameter that is being used - No. of Attempts (1), Time Limits, Slide Timing, everything is identical on all question slides, and this happens in a totally random manner, I can't duplicate it on purpose at all.

Under the Quiz tab, the only difference on each question slide is which Slide they are sent to on the Last Attempt: Jump to slide (which is always the next slide in the deck with the detailed explanation).
Since there is a 3-second pause so the user sees the "Correct!" graphic, I thought maybe it was a timer issue, so I tried waiting until the countdown reached 2 seconds or less to give a correct answer (in case that pause crossed the page's time limit), except it worked as expected, so it wasn't that. Also, this happens when there is plenty of time left.
Is it possible this is some kind of browser cacheing issue? I've been going through the test dozens of times (both in HTML 5 preview and published to our LMS) to make sure everything functions correctly as I've been building. I'm totally baffled here.
