🐛 [Fix] loss function calculation, detach predicts

yolo/tools/loss_functions.py

@@ -88,7 +88,7 @@ class YOLOLoss:
     def __call__(self, predicts: List[Tensor], targets: Tensor) -> Tuple[Tensor, Tensor, Tensor]:
         predicts_cls, predicts_anc, predicts_box = predicts
         # For each predicted targets, assign a best suitable ground truth box.
-        align_targets, valid_masks = self.matcher(targets, (predicts_cls, predicts_box))
+        align_targets, valid_masks = self.matcher(targets, (predicts_cls.detach(), predicts_box.detach()))
 
         targets_cls, targets_bbox = self.separate_anchor(align_targets)
         predicts_box = predicts_box / self.vec2box.scaler[None, :, None]