diff --git a/addons/gloot/ui/ctrl_dragable.gd b/addons/gloot/ui/ctrl_dragable.gd
index 2581275f..56ca9a95 100644
--- a/addons/gloot/ui/ctrl_dragable.gd
+++ b/addons/gloot/ui/ctrl_dragable.gd
@@ -98,7 +98,7 @@ func _notification(what) -> void:
         _preview_node.queue_free()
 
 
-func _process(_delta) -> void:
+func _physics_process(_delta) -> void:
     if drag_preview:
         drag_preview.global_position = get_global_mouse_position() - get_grab_offset()
 
diff --git a/addons/gloot/ui/ctrl_inventory_grid_ex.gd b/addons/gloot/ui/ctrl_inventory_grid_ex.gd
index c4ca67bb..1ce23c09 100644
--- a/addons/gloot/ui/ctrl_inventory_grid_ex.gd
+++ b/addons/gloot/ui/ctrl_inventory_grid_ex.gd
@@ -59,11 +59,12 @@ func _refresh_selection() -> void:
 
 
 func _refresh_field_background_grid() -> void:
-    if _field_background_grid:
-        remove_child(_field_background_grid)
-        _field_background_grid.queue_free()
-        _field_background_grid = null
-        _field_backgrounds = []
+    if _field_background_grid == null:
+        return
+    remove_child(_field_background_grid)
+    _field_background_grid.queue_free()
+    _field_background_grid = null
+    _field_backgrounds = []
 
     _create_field_background_grid()
 
diff --git a/addons/gloot/ui/ctrl_item_slot.gd b/addons/gloot/ui/ctrl_item_slot.gd
index cff4351b..e07d7cdd 100644
--- a/addons/gloot/ui/ctrl_item_slot.gd
+++ b/addons/gloot/ui/ctrl_item_slot.gd
@@ -212,9 +212,9 @@ func _refresh() -> void:
 
 
 func _clear() -> void:
-    if _label:
-        _label.text = ""
-    if _ctrl_inventory_item_rect:
-        _ctrl_inventory_item_rect.item = null
-        _ctrl_inventory_item_rect.texture = default_item_icon
+    if _label == null || _ctrl_inventory_item_rect == null:
+        return
+    _label.text = ""
+    _ctrl_inventory_item_rect.item = null
+    _ctrl_inventory_item_rect.texture = default_item_icon