Session resume appears to be broken for me

[latentflip]

session-resume on an issue comment for example doesn't seem to be working for me properly in chrome and I just lost a bunch of text from accidentally closing a tab :(

These things work

1. Type in an issue comment, refresh the tab, text is still there
2. Type in an issue comment, close the tab, reopen with cmd-shift-t, text is still there

I suspect the browser is doing this though, rather than session-resume.

This does not work

1. Type in an issue comment, close the tab, open a new tab, navigate to issue url - issue comment box is empty.
2. Have two tabs to github.com, in one type in an issue comment box, close the tab. In the other sessionStorage is still empty.