Canvas crashes when copy-and-pasting content from another page

Community Member

I imported an old Canvas course into a current one. In creating a new assignment, I opened one of the old imported assignments in edit mode, copied the content, and pasted the content into the new assignment. My Canvas tabs promptly froze. I could not scroll up or down in the page of with the pasted content, nor click to move the cursor to another spot. The entire browser seemed to get bogged down (using Chrome on Windows 10), so that it would take a full minute to switch to another tab after clicking. 

I have tried quitting Chrome and restarting a couple of times, and the same behavior keeps occurring. If it is relevant, there are displayed equations in the content I am copying and pasting.