I might try the bar if this happens again (the CDs are keeping her bin very snug) or move her to a tank with a sliding lock lid. I've kept most of my animals in racks, since 2010 and have never had this happen. I've only ever had one other jailbreak and that was over 6 years ago when my daughter forgot to lock the ExoTerra on her Kingsnake's tank.
Yep, I'll update if I end up with a clutch. I really hope I don't. *fingers crossed*