Never IB AFK, it is not safe.
Also the bot often crashes wow when wow or HB stops/quits, but also when wow goes to loading screen, so this might soimply be the problem when IB goes to loading screen that HB crashes wow.
Many has repported this issue, but the fix for this seems to be far away.
The fix for this is to use ARelog, that will start the bot up again after the crash. but still, don?t AFK IB.