Theme Conflicts and Mobile Rendering Issues

Flexibar is built to work with every Shopify theme - Dawn, Refresh, Symmetry, Impulse, Prestige, Warehouse, Motion, and the long tail of premium themes. But every now and then a theme overrides global header styles in ways that cause the bar to overlap, sit behind a sticky header, or render incorrectly on iOS Safari. Here are the fixes.

Symptom: bar overlapping the header logo

Cause: theme has a sticky header with its own z-index that doesn't account for the bar above it.

Fix:

1. Open Flexibar bar settings → Display → Position.
2. Switch from "Below header" to "Above header (push down)".
3. If the theme still overlaps, enable Force header offset - Flexibar will inject a CSS rule that pushes the header down by the bar's height.

Symptom: bar sitting behind a sticky element on scroll

Cause: theme uses a high z-index on the sticky header (often 9999 or higher).

Fix:

1. Open Flexibar → Display → Advanced.
2. Increase the bar's z-index to 2147483646 (max safe integer).

Symptom: bar broken on iOS Safari

Cause: usually the theme uses position: -webkit-sticky which conflicts with bar positioning.

Fix:

1. In Flexibar → Display → Mobile, switch position to "Fixed top" instead of "Sticky".
2. If the bar still jumps on scroll, enable iOS scroll fix in advanced settings.

Symptom: bar not visible on /products/* but visible elsewhere

Cause: product page template wraps the header in a different container that has its own overflow rules.

Fix: enable Page template detection - Flexibar will auto-attach to the correct container per template.

Last resort: custom CSS

If a theme is genuinely incompatible, paste a custom CSS rule in Flexibar → Display → Custom CSS. Common one-liner that fixes 80% of remaining issues:

#flexibar-root { z-index: 2147483646 !important; position: fixed !important; top: 0 !important; left: 0 !important; right: 0 !important; }

If that doesn't fix it, send your theme name and store URL to support - we maintain a per-theme override library and can ship a tested rule.