I was able to finally get around to this issue and found the cause - this document has a font that has a ton of information (over 2 billion characters) and there was a couple algorithms that did not handle that size very well.
I have optimized those algorithms and this issue should be resolved in the next release (8.2)
I’ve also had this issue of it freezing the page, I had to restart my browser to get them to load again. It happened at random for all documents. Hopefully this also solves whatever issues I was having.