adding links in Markdown block crashes Squarespace (bug?)

I finally got links to work - but the whole page is still crashing when I try to save / edit Markdown blocks. 
I have a lot of FAQs - so it's going to be a long block. I either need the markdown not to crash - or a different method of creating collapsible/accordion style FAQs. thanks!

I haven't experienced it locking up but there's currently an issue when trying to add links to Markdown Blocks. When you click in the link icon, the link editor appears behind the Markdown editor, making it almost impossible to add the link details. Perhaps this is causing the UI to appear to be unresponsive?

Here's what I see: 

I recommend you report your experiences to Squarespace Customer Care. You can reach out to them here.

I'm not seeing the issues you are both reporting so apparently it's not system wide.