Images disappear and fail to load in multiplayer instuctions

Problem description:

I think I can describe this error with the following video:

Refresh Instructions Image Glitch.webm - Google Drive

In multiplayer, only the most recent user sees the images in the instructions tab. Images fail to load properly/disappear for all other users from the instructions until they refresh (but then this makes them disappear for the others.

Expected behaviour:
Images within instructions should load for ALL students using multiplayer

Actual behavior:

Steps to reproduce:
See video: