From c8535a8772bb10a311e6d6a82f2c69bdeee6e416 Mon Sep 17 00:00:00 2001
From: Seung Hyun Kim <skim449@illinois.edu>
Date: Sun, 30 Jun 2024 21:04:52 -0500
Subject: [PATCH] fix: first callback execution

---
 elastica/modules/callbacks.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/elastica/modules/callbacks.py b/elastica/modules/callbacks.py
index 9d886926..4028b94a 100644
--- a/elastica/modules/callbacks.py
+++ b/elastica/modules/callbacks.py
@@ -74,6 +74,9 @@ def _finalize_callback(self: SystemCollectionProtocol) -> None:
         self._callback_list.clear()
         del self._callback_list
 
+        # First callback execution
+        self.apply_callbacks(time=np.float64(0.0), current_step=0)
+
 
 class _CallBack:
     """