Bug: Editor crashes after a value in setting gets set to null somehow

[ishields]

This has happened a few times now where something gets corrupted and i ends up being null. The editor then crashes. The only way to fix it is put a breakpoint in chrome debugger. Then set i to an empty string. Then the page loads and you can manually delete the section that has the null. I'm not exactly sure how "i" is getting set to null but it should handle it so the editor doesn't crash.

n = new DOMParser().parseFromString(i.replace(/<br\/?>/g, " "), "text/html").body.textContent;