From 0b5f59b7d8f4b60637799ada63e7e0847da2c9a4 Mon Sep 17 00:00:00 2001
From: Raynel Sanchez <87539502+raynelfss@users.noreply.github.com>
Date: Wed, 11 Dec 2024 17:15:53 -0500
Subject: [PATCH] Docs: Add relevant comment

---
 crates/circuit/src/circuit_data.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/crates/circuit/src/circuit_data.rs b/crates/circuit/src/circuit_data.rs
index 699ad5f3d1c0..fa36d8b841fb 100644
--- a/crates/circuit/src/circuit_data.rs
+++ b/crates/circuit/src/circuit_data.rs
@@ -1392,8 +1392,11 @@ impl CircuitData {
                             #[cfg(feature = "cache_pygates")]
                             {
                                 // Standard gates can all rebuild their definitions, so if the
-                                // cached py_op exists, update the `params` attribute and clear out
-                                // any existing cache.
+                                // cached py_op exists, discard it to prompt the instruction
+                                // to rebuild its cached python gate upon request later on. This is
+                                // done to avoid an unintentional duplicated reference to the same gate
+                                // instance in python. For more information, see
+                                // https://github.com/Qiskit/qiskit/issues/13504
                                 previous.py_op.take();
                             }
                         } else {