Scroll Container内の絶対配置またはAG Gridのバグ

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<div class="ag-aria-description-container" aria-live="polite" aria-relevant="additions text" aria-atomic="true">Press ENTER to sort. Press CTRL ENTER to open filter</div>

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.ag-aria-description-container {
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    border: 0;
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    z-index: 9999;
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    clip: rect(1px, 1px, 1px, 1px);
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    height: 1px;
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    overflow: hidden;
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    padding: 0;
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    position: absolute;
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    white-space: nowrap;
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    width: 1px;
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}