iPad - slow response when linking to Question Bank

I'm experiencing a problem where it's taking several minutes for game questions to appear on the iPad. Any clues from the Community are much appreciated...

I'm not in a position to share my Story (sorry about that) but I am attaching a PDF with two screen prints to show the set-up of my question banks.

The question banks are inserted into a game-based course with 2 rounds of play.

• There are 4 Question Banks (1 for each topic) and each bank includes 6 questions.
• Each round requires the learner to answer 3 questions from each bank - and... 
• twice they land on the challenge square in which they must answer a more difficult question. That question is not randomized and I have it locked at the bottom of the QB tree - unless it is the question being asked. 

• To get to the question bank, the learner clicks either a hotspot or the next button (I've tried both triggers)... This is where the problem comes in.

The question shows up immediately on the PC or Laptop, but on the iPad, after the trigger is tapped, it can literally take minutes for the question to show up. It's been tested on SCORM Cloud and the client's LMS on 2 differrent iPad devices with the same results.

I've tried everything I can think of and now I'm to the point where I'm beginning to think I won't be able to randomize the questions - or - could it be ??? - not be able to include question banks? 

Signed,

Stumped