Restoration of window history disappears after showing for a few seconds

I tried the nightly (iTerm2-2_9_20150505-nightly) and did a system restart, and my previous window history showed for a few seconds (i.e. while the rest of my applications were loading), but then the iTerm2 tabs/windows cleared themselves, leaving a blank line followed by a line with the active command prompt. Good news is that each tab/window appears to be in the same directory prior to restarting.

When experiencing this issue, I had two windows open: the first with one tab, and the other with three tabs.