diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20127bc..5fbdaad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # `cdshealpix` Change Log
 
+## 0.7.2
+
+Released 2024-11-12
+
+### Bug correction
+
+* Wrong parameter (`cos(lon)` instead of `cos(lat)`) 
+  in `h_to_h_and_shs` method leading to possibly miss 
+  cells in cone/ring coverage in case of  cones/ring 
+  much smaller than requested HEALPix cells. 
+
+
 ## 0.7.1
 
 Released 2024-11-08
diff --git a/Cargo.toml b/Cargo.toml
index 4786fe0..612647d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cdshealpix"
-version = "0.7.1"
+version = "0.7.2"
 authors = ["F.-X. Pineau <francois-xavier.pineau@astro.unistra.fr>"]
 edition = "2021"
 rust-version = "1.81"
diff --git a/src/nested/mod.rs b/src/nested/mod.rs
index 54a8a91..c5ceecd 100644
--- a/src/nested/mod.rs
+++ b/src/nested/mod.rs
@@ -2507,7 +2507,7 @@ impl Layer {
     }
     // Common variable
     let cos_cone_lat = cone_lat.cos();
-    let shs_cone_radius = dbg!(to_squared_half_segment(cone_radius));
+    let shs_cone_radius = to_squared_half_segment(cone_radius);
     // Special case of very large radius: test the 12 base cells
     if !has_best_starting_depth(cone_radius) {
       let distances = largest_center_to_vertex_distances_with_radius(
@@ -2982,8 +2982,9 @@ impl Layer {
           ),
       );
       let root_layer = get(depth_start);
+      let center_hash_at_depth_start = root_layer.hash(cone_lon, cone_lat);
       let mut neigs: Vec<u64> = root_layer
-        .neighbours(root_layer.hash(cone_lon, cone_lat), true)
+        .neighbours(center_hash_at_depth_start, true)
         .values_vec()
         .iter()
         .filter(|neigh| {
@@ -3287,8 +3288,9 @@ impl Layer {
           ),
       );
       let root_layer = get(depth_start);
+      let center_hash_at_depth_start = root_layer.hash(cone_lon, cone_lat);
       let mut neigs: Vec<u64> = root_layer
-        .neighbours(root_layer.hash(cone_lon, cone_lat), true)
+        .neighbours(center_hash_at_depth_start, true)
         .values_vec()
         .iter()
         .map(h_to_h_and_shs(cone_lon, cone_lat, cos_cone_lat, root_layer))
@@ -4399,7 +4401,7 @@ fn h_to_h_and_shs(
     let (lon, lat) = layer.center(hash);
     (
       hash,
-      squared_half_segment(lon - cone_lon, lat - cone_lat, lon.cos(), cos_cone_lat),
+      squared_half_segment(lon - cone_lon, lat - cone_lat, lat.cos(), cos_cone_lat),
     )
   }
 }
@@ -4827,6 +4829,42 @@ mod tests {
     }
   }
 
+  #[test]
+  fn testok_cone_approx_custom_bmoc_v2() {
+    let actual_res = cone_coverage_approx_custom(
+      6,
+      3,
+      8.401978_f64.to_radians(),
+      84.675171_f64.to_radians(),
+      0.0008_f64.to_radians(),
+    );
+    /*for cell in actual_res.flat_iter() {
+      println!("@@@@@ cell a: {:?}", cell);
+    }*/
+    let expected_res: [u64; 1] = [4075];
+    assert_eq!(actual_res.flat_iter().deep_size(), expected_res.len());
+    for (h1, h2) in actual_res.flat_iter().zip(expected_res.iter()) {
+      assert_eq!(h1, *h2);
+    }
+
+    println!("----------");
+
+    let actual_res = cone_coverage_approx_custom(
+      6,
+      3,
+      8.401978_f64.to_radians(),
+      84.675171_f64.to_radians(),
+      0.0004_f64.to_radians(),
+    );
+    /*for cell in actual_res.flat_iter() {
+      println!("@@@@@ cell a: {:?}", cell);
+    }*/
+    assert_eq!(actual_res.flat_iter().deep_size(), expected_res.len());
+    for (h1, h2) in actual_res.flat_iter().zip(expected_res.iter()) {
+      assert_eq!(h1, *h2);
+    }
+  }
+
   #[test]
   fn testok_cone_approx_custom_bmoc_dbg() {
     let actual_res = cone_coverage_approx_custom(