<!DOCTYPE html> <title> Nested out-of-flow positioned element in multicol with vertical-rl writing mode. </title> <link rel="help" href="https://www.w3.org/TR/css-position-3/#abspos-breaking"> <link rel="match" href="../reference/ref-filled-green-100px-square.xht"> <style> .multicol { writing-mode: vertical-rl; columns: 2; column-fill: auto; column-gap: 0; height: 100px; width: 100px; background: red; color: red; } .fixed { position: fixed; inline-size: 50px; block-size: 200px; inset-block-start: 0; inset-inline-start: 0; background: green; } </style> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div class="multicol"> <div style="transform: translateX(0);"> FAIL <div style="position: relative;"> <div style="position: absolute;"> <div class="fixed"></div> </div> </div> </div> </div>