This article is specific to Swatch King compatibility behavior. For general variant/swatch disappearance troubleshooting, use Fix Size Chart Disappearing After Variant or Swatch Selection.
Known Swatch King behavior
Variant blocks may be rebuilt after selection.
IDs/classes can change after interaction.
Previously injected elements can disappear or move.
Swatch King-safe placement guidance
Do not inject inside Swatch King-managed option wrappers.
Prefer Kiwi App Block where possible.
If using selector injection, target stable parent containers outside dynamic swatch markup.
Use modal display fallback when inline placement remains unstable.