No need to check filename extensions to detect shuffle controlnet.

comfy/controlnet.py

 import torch
 import math
+import os
 import comfy.utils
 import comfy.model_management
 import comfy.model_detection
@@ -386,7 +387,8 @@ def load_controlnet(ckpt_path, model=None):
         control_model = control_model.half()
 
     global_average_pooling = False
-    if ckpt_path.endswith("_shuffle.pth") or ckpt_path.endswith("_shuffle.safetensors") or ckpt_path.endswith("_shuffle_fp16.safetensors"): #TODO: smarter way of enabling global_average_pooling
+    filename = os.path.splitext(ckpt_path)[0]
+    if filename.endswith("_shuffle") or filename.endswith("_shuffle_fp16"): #TODO: smarter way of enabling global_average_pooling
         global_average_pooling = True
 
     control = ControlNet(control_model, global_average_pooling=global_average_pooling)