Could you post a screenshot of what you see? What browser are you using to work on your store?
When I login to aq-dev-store.myshopify.com I do see the Admin bar, so I'm wondering if it's local to you or if there's a bigger issue. :)
Let me know!
Ben here from Shopify,
You may want to email us at firstname.lastname@example.org this would be either a local issue with your machine or something specific to that account.
Please email us with details on what store to look at and will take a deeper look into what is causing the issue. There has been no reported issues with the admin bar in Chrome.
I hope this helps! Feel free to reach out if you have any further questions :)
Ben C - Shopify Guru