diff --git a/plugins/out_opentelemetry/opentelemetry.c b/plugins/out_opentelemetry/opentelemetry.c
index cc5680ba3b2..8471c8102f6 100644
--- a/plugins/out_opentelemetry/opentelemetry.c
+++ b/plugins/out_opentelemetry/opentelemetry.c
@@ -312,7 +312,7 @@ static int process_metrics(struct flb_event_chunk *event_chunk,
         diff = off;
 
         /* concat buffer */
-        flb_sds_cat_safe(&buf, encoded_chunk, flb_sds_len(encoded_chunk));
+        flb_sds_cat_safe(&buf, encoded_chunk, cfl_sds_len(encoded_chunk));
 
         /* release */
         cmt_encode_opentelemetry_destroy(encoded_chunk);
diff --git a/plugins/out_opentelemetry/opentelemetry_conf.c b/plugins/out_opentelemetry/opentelemetry_conf.c
index 80a193d37b5..f6c8b40ba9c 100644
--- a/plugins/out_opentelemetry/opentelemetry_conf.c
+++ b/plugins/out_opentelemetry/opentelemetry_conf.c
@@ -555,15 +555,15 @@ void flb_opentelemetry_context_destroy(struct opentelemetry_context *ctx)
         flb_upstream_destroy(ctx->u);
     }
 
-    if (ctx->logs_uri_sanitized != NULL) {
+    if (ctx->logs_uri_sanitized != NULL &&  ctx->logs_uri_sanitized != ctx->logs_uri) {
         flb_free(ctx->logs_uri_sanitized);
     }
 
-    if (ctx->traces_uri_sanitized != NULL) {
+    if (ctx->traces_uri_sanitized != NULL && ctx->traces_uri_sanitized != ctx->traces_uri) {
         flb_free(ctx->traces_uri_sanitized);
     }
 
-    if (ctx->metrics_uri_sanitized != NULL) {
+    if (ctx->metrics_uri_sanitized != NULL && ctx->metrics_uri_sanitized != ctx->metrics_uri) {
         flb_free(ctx->metrics_uri_sanitized);
     }