bootstrap tooltip does not work properly

Hello,
Please open this page
http://ec2-34-212-140-26.us-west-2.compute.amazonaws.com/admin/test/index
of bootstrap (v4.0.0-alpha.6) tooltip example.
In comparison with original page https://v4-alpha.getbootstrap.com/components/tooltips/ tooltip text are always visible at bottom and the first
button […]

See original post by invalid@example.com (mstdmstd)