See #1227. Clear cache when activating drawings.

src/bonsai/bonsai/bim/module/drawing/decoration.py

@@ -1595,6 +1595,9 @@ class CutDecorator:
 
     @classmethod
     def install(cls, context):
+        DecoratorData.cut_cache.clear()
+        DecoratorData.slice_cache.clear()
+        DecoratorData.fill_cache.clear()
         if cls.installed:
             cls.uninstall()
         handler = cls()

src/bonsai/bonsai/bim/module/drawing/operator.py

@@ -2180,7 +2180,6 @@ class ActivateDrawing(bpy.types.Operator, ActivateDrawingBase):
 
     @classmethod
     def poll(cls, context):
-        props = tool.Drawing.get_document_props()
         if not tool.Drawing.get_active_drawing_item():
             cls.poll_message_set("No drawing selected.")
             return False