The attached patch fixes the [original testcase](https://bugzilla.mozilla.org/attachment.cgi?id=9399269) (bottom-fixed element nested inside bottom-fixed element). A fix for the [modified test case](https://bugzilla.mozilla.org/attachment.cgi?id=9411893) will be deferred to a follow-up bug.
Bug 1894136 Comment 6 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
The attached patch fixes the [original testcase](https://bugzilla.mozilla.org/attachment.cgi?id=9399269) (bottom-fixed element nested inside bottom-fixed element). A fix for the [modified test case](https://bugzilla.mozilla.org/attachment.cgi?id=9411893) (top-fixed element inside bottom-fixed element) will be deferred to a follow-up bug.