Consistent 502 errors on specific wiki pages

Recently I have been using the built in wiki on a private project to keep notes about the project as it is developed.
The main page that I can no longer load contains a rather large amount of <table> HTML. If I clone the project wiki locally, it is still all there, however not being accessible in the browser is frustrating as it adds a hurdle for some of the users of the wiki. I was just wondering if this is a known issue with large (3MB .md file) wiki pages, or if I am encountering another issue. (Such as some of the HTML on the page actually breaking gitlabs ability to render it? This doesn’t seem likely, but I have no way of troubleshooting the problem to find out more).

Edit: To clarify, this is on a free tier account, not a self-hosted instance.