scrollable ember-collection

On Mac Safari, with System Preferences set to "Scroll Always",
a vertically oriented ember-collection with content larger than its container does not show a visible scroll bar.
This is not a problem in other browsers such as Chrome.
We discovered that the presence of matrix3d() in the style generated inside the ember-collection seems to be responsible. Forcing matrix3d() to be replaced with matrix() seems to solve the issue.