diff --git a/agent/credential_pool.py b/agent/credential_pool.py
index 204d154116d..2cf9efe5620 100644
--- a/agent/credential_pool.py
+++ b/agent/credential_pool.py
@@ -450,8 +450,8 @@ class CredentialPool:
                                 refreshed["refresh_token"],
                                 refreshed["expires_at_ms"],
                             )
-                        except Exception:
-                            pass
+                        except Exception as wexc:
+                            logger.debug("Failed to write refreshed token to credentials file (retry path): %s", wexc)
                         return updated
                     except Exception as retry_exc:
                         logger.debug("Retry refresh also failed: %s", retry_exc)