diff --git a/input/elasticapm/internal/modeldecoder/v2/transaction_test.go b/input/elasticapm/internal/modeldecoder/v2/transaction_test.go
index b2462f82..e1e4859a 100644
--- a/input/elasticapm/internal/modeldecoder/v2/transaction_test.go
+++ b/input/elasticapm/internal/modeldecoder/v2/transaction_test.go
@@ -643,12 +643,10 @@ func TestDecodeMapToTransactionModel(t *testing.T) {
 			var input transaction
 			var event modelpb.APMEvent
 			modeldecodertest.SetStructValues(&input, modeldecodertest.DefaultValues())
-			input.Type.Reset()
 			attrs := map[string]interface{}{
 				"elastic.profiler_stack_trace_ids": []interface{}{"id1", "id2"},
 			}
 			input.OTel.Attributes = attrs
-			input.OTel.SpanKind.Reset()
 
 			mapToTransactionModel(&input, &event)
 			assert.Equal(t, []string{"id1", "id2"}, event.Transaction.ProfilerStackTraceIds)
diff --git a/input/otlp/traces.go b/input/otlp/traces.go
index 0bd99c09..b9fe0339 100644
--- a/input/otlp/traces.go
+++ b/input/otlp/traces.go
@@ -278,7 +278,7 @@ func TranslateTransaction(
 			switch kDots {
 			case "elastic.profiler_stack_trace_ids":
 				var vSlice = v.Slice()
-				event.Transaction.ProfilerStackTraceIds = make([]string, 0, vSlice.Len())
+				event.Transaction.ProfilerStackTraceIds = slices.Grow(event.Transaction.ProfilerStackTraceIds, vSlice.Len())
 				for i := 0; i < vSlice.Len(); i++ {
 					var idVal = vSlice.At(i)
 					if idVal.Type() == pcommon.ValueTypeStr {