Updater doesn't restore session

Restoring sessions (windows, tabs, split panes, bash "locations") works fine when doing an OS restart. It doesn't work when iTerm suggests installing an update, instead it opens a single window with a single tab and a new default session.

• iTerm2 version: Build 2.9.20160523
• OS version: 10.11.4
• Attach ~/Library/Preferences/com.googlecode.iterm2.plist here: com.googlecode.iterm2.plist
• Attach a debug log (https://iterm2.com/debuglog) - can't do this, since I just installed the update