diff --git a/src/components/backend-core/src/microservice-proxy.ts b/src/components/backend-core/src/microservice-proxy.ts
index 3fcb2b4f..92489b75 100644
--- a/src/components/backend-core/src/microservice-proxy.ts
+++ b/src/components/backend-core/src/microservice-proxy.ts
@@ -800,9 +800,6 @@ function canRetryProviderHttpTunnel(method: string, targetPath: string): boolean
 
 function providerHttpTunnelWaitMs(service: MicroserviceConfig, attempt: number, retryable: boolean): number {
   const baseTimeoutMs = Math.max(1000, service.backend.timeoutMs);
-  if (!retryable) return baseTimeoutMs + 3000;
-  if (attempt === 1) return Math.min(baseTimeoutMs + 3000, Math.max(5000, Math.floor(baseTimeoutMs * 0.45)));
-  if (attempt === 2) return Math.min(baseTimeoutMs + 3000, Math.max(6000, Math.floor(baseTimeoutMs * 0.7)));
   return baseTimeoutMs + 3000;
 }
 
@@ -946,7 +943,7 @@ async function providerHttpTunnelMicroserviceResponse(
     const durationMs = Date.now() - startedAt;
     if (message === null) {
       attempts.push({ attempt, requestId, ok: false, reason: reason ?? "timeout", durationMs, timeoutMs });
-      if (retryable && tunnelFailureRetryable(reason) && attempt < maxAttempts) {
+      if (retryable && reason !== "timeout" && tunnelFailureRetryable(reason) && attempt < maxAttempts) {
         logger("warn", "http_tunnel_retry", {
           providerId: service.providerId,
           serviceId: service.id,