Quiz Questions Occasionally Not Loading/Rendering Correctly

Hi all, I've created several quizzes in Captivate and host them in courses on Adobe Learning Manager, however we encounter issues where quiz questions don't always load correctly. For example, the question itself or one or more multiple choice answers (or images if those are included in the quiz (although most of our quizzes don't have images)) may not be visible at all, which obviously complicates the learner's process of trying to determine and select the correct answer. We've gotten by with this bug so far and apologized to learners as we go, but management is wanting the data we get from these quizzes to be more reliable, and in it's current form it's not. 

It's not something we've been able to replicate consistently; I have no clue what's triggering the image not to load. To provide additional context that I've seen requested in other posts here, I'm using Captivate 19 Version 11.5.5 (64 bit), and we use Adobe Learning Manager as our LMS. Below is a screenshot from the Quiz settings page, and many of our quizzes make use of the question pool feature of Adobe as well. If anyone has any insight on how to fix this issue I would greatly appreciate it!