Issue: Page freezes when editing article with large Content Block

When attempting to edit one particular article containing a large content block, the page freezes or times out and won’t open the Edit screen. 
 

Details:

• The content block contains a significant amount of content and multiple tables.
• While there are other content blocks with similar complexity, this is the only one causing the issue
• My Zendesk admin investigated the issue a little bit and came back with, “Something is hanging in the network tab, but I can’t work it out.” 

Notes:

• I wonder if this is related to the HTML Editor slowness issue discussed here: Zendesk HTML Editor Slowness ?