Tentatively calling this S2 since this seems like a pretty big potential source of brokenness in `content-visibility:auto`, and the user impact is likely to involve missing/invisible content rather than just cosmetic problems.
Bug 1829016 Comment 4 Edit History
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Tentatively calling this S2 since this seems like a pretty big potential source of brokenness in `content-visibility:auto`, and the user impact is likely to involve missing/invisible content rather than just cosmetic problems. (And we know of at least one affected site, per comment 0.)