diff --git a/space_view3d_math_vis/utils.py b/space_view3d_math_vis/utils.py
index 28ceb554b..526c563b5 100644
--- a/space_view3d_math_vis/utils.py
+++ b/space_view3d_math_vis/utils.py
@@ -155,6 +155,13 @@ def console_math_data():
             if not disp:
                 continue
 
+        # In case `var` is a RNA struct 'proxy', check if the underlying RNA data is still valid.
+        # It can become invalid due to Blender data being freed or re-allocated e.g.
+        try:
+            hasattr(var, "bl_rna")
+        except ReferenceError:
+            continue
+
         if isinstance(var, Matrix):
             if len(var.col) != 4 or len(var.row) != 4:
                 if len(var.col) == len(var.row):