Elements with table-row, table-row-group, table-header-group, table-footer-group, table-cell, and table-caption that have a transform property should be containing blocks for fixed position elements. Blink currently does not make <tr>, <tbody>, <tfoot>, and <thead> be a containing block for fixed position elements, which we propose to change.
Docs: https://www.w3.org/TR/css-transforms-1/#transformable-element https://www.w3.org/TR/css-transforms-1/#transform-rendering
Samples: http://output.jsbin.com/cemigih