This article explains why charts may disappear after variant changes and how Reinject works. For the full troubleshooting workflow, use Fix Size Chart Disappearing After Variant or Swatch Selection.
When variants change, some themes rebuild parts of the product page. If the chart is injected inside a rebuilt container, it can disappear.
Quick fix to try first
Enable Reinject in Kiwi (Styles & Settings -> Enable reinject -> Save).
Retest on a live product page while switching variants.
What Reinject does
Watches for product-page content changes.
Re-adds chart/recommender if a theme removes it.
Improves stability on dynamic variant updates.
For complete troubleshooting steps, see Fix Size Chart Disappearing After Variant or Swatch Selection.