diff --git a/pkg/backends/clickhouse/handler_health.go b/pkg/backends/clickhouse/handler_health.go
index 20820a95f..6ca1d8195 100644
--- a/pkg/backends/clickhouse/handler_health.go
+++ b/pkg/backends/clickhouse/handler_health.go
@@ -49,7 +49,7 @@ func (c *Client) HealthHandler(w http.ResponseWriter, r *http.Request) {
 	rsc := request.GetResources(r)
 	req = req.WithContext(tctx.WithHealthCheckFlag(tctx.WithResources(context.Background(), rsc), true))
 
-	req.Header = c.healthHeaders
+	req.Header = c.healthHeaders.Clone()
 	engines.DoProxy(w, req, true)
 
 }
diff --git a/pkg/backends/irondb/handler_health.go b/pkg/backends/irondb/handler_health.go
index 4ab8faff9..23f70a0ea 100644
--- a/pkg/backends/irondb/handler_health.go
+++ b/pkg/backends/irondb/handler_health.go
@@ -43,7 +43,7 @@ func (c *Client) HealthHandler(w http.ResponseWriter, r *http.Request) {
 	rsc := request.GetResources(r)
 	req = req.WithContext(tctx.WithHealthCheckFlag(tctx.WithResources(context.Background(), rsc), true))
 
-	req.Header = c.healthHeaders
+	req.Header = c.healthHeaders.Clone()
 	engines.DoProxy(w, req, true)
 
 }
diff --git a/pkg/backends/prometheus/handler_health.go b/pkg/backends/prometheus/handler_health.go
index 59b52a24b..bc1a45bb1 100644
--- a/pkg/backends/prometheus/handler_health.go
+++ b/pkg/backends/prometheus/handler_health.go
@@ -45,7 +45,7 @@ func (c *Client) HealthHandler(w http.ResponseWriter, r *http.Request) {
 	rsc := request.GetResources(r)
 	req = req.WithContext(tctx.WithHealthCheckFlag(tctx.WithResources(context.Background(), rsc), true))
 
-	req.Header = c.healthHeaders
+	req.Header = c.healthHeaders.Clone()
 	engines.DoProxy(w, req, true)
 }
 
diff --git a/pkg/backends/reverseproxy/handler_health.go b/pkg/backends/reverseproxy/handler_health.go
index 0e1700a1b..707ddb945 100644
--- a/pkg/backends/reverseproxy/handler_health.go
+++ b/pkg/backends/reverseproxy/handler_health.go
@@ -44,7 +44,7 @@ func (c *Client) HealthHandler(w http.ResponseWriter, r *http.Request) {
 	rsc := request.GetResources(r)
 	req = req.WithContext(tctx.WithHealthCheckFlag(tctx.WithResources(context.Background(), rsc), true))
 
-	req.Header = c.healthHeaders
+	req.Header = c.healthHeaders.Clone()
 	engines.DoProxy(w, req, true)
 }
 
diff --git a/pkg/backends/reverseproxycache/handler_health.go b/pkg/backends/reverseproxycache/handler_health.go
index f0c790468..93f72d907 100644
--- a/pkg/backends/reverseproxycache/handler_health.go
+++ b/pkg/backends/reverseproxycache/handler_health.go
@@ -44,7 +44,7 @@ func (c *Client) HealthHandler(w http.ResponseWriter, r *http.Request) {
 	rsc := request.GetResources(r)
 	req = req.WithContext(tctx.WithHealthCheckFlag(tctx.WithResources(context.Background(), rsc), true))
 
-	req.Header = c.healthHeaders
+	req.Header = c.healthHeaders.Clone()
 	engines.DoProxy(w, req, true)
 }