Derived codec can't decode after binary serde of encoded data

[catostrophe]

Failing test:

import cats.data.NonEmptyList
import org.apache.avro.generic.GenericData
import org.scalacheck.ScalacheckShapeless
import org.scalatest.flatspec.AnyFlatSpec
import org.scalatest.matchers.should.Matchers
import org.scalatestplus.scalacheck.ScalaCheckDrivenPropertyChecks
import org.apache.avro.Schema
import org.apache.avro.generic.{GenericDatumReader, GenericDatumWriter}
import org.apache.avro.io.{DecoderFactory, EncoderFactory}
import vulcan.Codec
import vulcan.generic._

import java.io.ByteArrayOutputStream

class Test extends AnyFlatSpec with Matchers with ScalaCheckDrivenPropertyChecks with ScalacheckShapeless {

  case class Abracadabra(qwe: Option[NonEmptyList[Int]])

  it should "decode after encoding and binary serde" in {

    def serde(schema: Schema)(a: Any): Any = {
      val writer = new GenericDatumWriter[Any](schema)
      val out = new ByteArrayOutputStream
      val encoder = EncoderFactory.get.binaryEncoder(out, null)
      val ba =
        try {
          writer.write(a, encoder)
          encoder.flush()
          out.toByteArray
        } finally out.close()

      val reader = new GenericDatumReader[Any](schema)
      val decoder = DecoderFactory.get.binaryDecoder(ba, null)
      val record = reader.read(null, decoder)

      record
    }

    val codec: Codec[Abracadabra] = Codec.derive[Abracadabra]
    val schema = codec.schema.toOption.get

    forAll { (x: Abracadabra) =>
      val encoded = codec.encode(x).toOption.get
      val serded = serde(schema)(encoded)

      val b1 = encoded.asInstanceOf[GenericData.Record] == serded.asInstanceOf[GenericData.Record]

      val r1 = codec.decode(encoded, schema)
      val r2 = codec.decode(serded, schema)

      println(x)
      println(b1)
      println(r1)
      println(r2)
      assert(r1 == r2)
    }
  }

}

It fails with:

AvroError(Error decoding Test.Abracadabra: Error decoding Option: Error decoding union: Missing alternative array in union)

The type of data that causes error is: Option[NonEmptyList[Int]]