diff --git a/src/decode/decoders.ts b/src/decode/decoders.ts
index 2e72739..28423e0 100644
--- a/src/decode/decoders.ts
+++ b/src/decode/decoders.ts
@@ -267,7 +267,7 @@ function decodeListItem(
 
   // Check for array header after hyphen
   if (isArrayHeaderAfterHyphen(afterHyphen)) {
-    const arrayHeader = parseArrayHeaderLine(afterHyphen, activeDelimiter)
+    const arrayHeader = parseArrayHeaderLine(afterHyphen, DEFAULT_DELIMITER)
     if (arrayHeader) {
       return decodeArrayFromHeader(arrayHeader.header, arrayHeader.inlineValues, cursor, baseDepth, options)
     }
diff --git a/test/decode.test.ts b/test/decode.test.ts
index 67a958c..89a9722 100644
--- a/test/decode.test.ts
+++ b/test/decode.test.ts
@@ -366,6 +366,14 @@ describe('delimiter options', () => {
       expect(decode(toon)).toEqual({ pairs: [['a', 'b'], ['c', 'd']] })
     })
 
+    it.each([
+      { parent: '[1\t]', nested: '[3]', values: 'a,b,c' },
+      { parent: '[1|]', nested: '[3]', values: 'a,b,c' },
+    ])('nested arrays inside list items default to comma delimiter', ({ parent, nested, values }) => {
+      const toon = `items${parent}:\n  - tags${nested}: ${values}`
+      expect(decode(toon)).toEqual({ items: [{ tags: ['a', 'b', 'c'] }] })
+    })
+
     it.each([
       { header: '[3\t]', joined: 'x\ty\tz' },
       { header: '[3|]', joined: 'x|y|z' },