From cbbc7eae29ffdc0f6281913de94888196630e8a1 Mon Sep 17 00:00:00 2001
From: "marcus.wirtz" <marcus.wirtz@snkeos.com>
Date: Fri, 19 Jul 2024 11:24:38 +0200
Subject: [PATCH] Fix randomness for threading

---
 monai/transforms/compose.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/monai/transforms/compose.py b/monai/transforms/compose.py
index 236d3cc4c51..bf0ae46b805 100644
--- a/monai/transforms/compose.py
+++ b/monai/transforms/compose.py
@@ -107,7 +107,11 @@ def execute_compose(
 
     for _transform in transforms[start:end]:
         if threading:
-            _transform = deepcopy(_transform) if isinstance(_transform, ThreadUnsafe) else _transform
+            if isinstance(_transform, ThreadUnsafe):
+                if isinstance(_transform, Randomizable):
+                    # update the random state before deepcopy, otherwise there is no randomness
+                    _transform.set_random_state()
+                _transform = deepcopy(_transform)
         data = apply_transform(
             _transform, data, map_items, unpack_items, lazy=lazy, overrides=overrides, log_stats=log_stats
         )