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SciTools · May 6, 2021 · 5231c68 · 5231c68
1 parent 5646b16
commit 5231c68
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/lib/iris/cube.py b/lib/iris/cube.py
@@ -3133,7 +3133,10 @@ def _intersect_modulus(
                 indices = inside_indices[split_cell_indices]
                 cells = bounds[indices]
                 if maximum % modulus not in cells:
-                    # Recalculate the extended minimum.
+                    # Recalculate the extended minimum only if the output bounds
+                    # do not span the requested (minumum, maximum) range.  If
+                    # they do span that range, this adjustment would give unexpected
+                    # results (see #3391).
                     cells_delta = np.diff(coord.bounds[indices])
 
                     # Watch out for ascending/descending bounds.