This might be specific to `layout.css.content-visibility-relevant-content-margin = 0` -- I tried setting that pref to small-but-nonzero values (e.g. `1.0` and making compensatory tweaks to the testcase (e.g. `left: -2px` or `-5px` instead of `-1px`) and wasn't able to trigger oscillation. So this *might* not be an issue with default pref settings, but I'm not sure. It'd be good to understand what's going on & how easy this is to trigger before we ship `content-visibility`, ideally.
Bug 1804761 Comment 1 Edit History
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This might be specific to `layout.css.content-visibility-relevant-content-margin = 0` -- I tried setting that pref to small-but-nonzero values, e.g. `1.0`, and making compensatory tweaks to the testcase (e.g. `left: -2px` or `-5px` instead of `-1px`) and wasn't able to trigger oscillation under those conditions. So this *might* not be an issue with default pref settings, but I'm not sure. It'd be good to understand what's going on & how easy this is to trigger before we ship `content-visibility`, ideally.