diff --git a/pageserver/src/layered_repository/delta_layer.rs b/pageserver/src/layered_repository/delta_layer.rs
index 7a763b52de..b4be07d3ab 100644
--- a/pageserver/src/layered_repository/delta_layer.rs
+++ b/pageserver/src/layered_repository/delta_layer.rs
@@ -251,6 +251,8 @@ impl Layer for DeltaLayer {
 
     /// Does this segment exist at given LSN?
     fn get_seg_exists(&self, lsn: Lsn) -> Result<bool> {
+        assert!(lsn >= self.start_lsn);
+
         // Is the requested LSN after the rel was dropped?
         if self.dropped && lsn >= self.end_lsn {
             return Ok(false);
diff --git a/pageserver/src/layered_repository/image_layer.rs b/pageserver/src/layered_repository/image_layer.rs
index 7110a48b30..1dce0559fb 100644
--- a/pageserver/src/layered_repository/image_layer.rs
+++ b/pageserver/src/layered_repository/image_layer.rs
@@ -157,7 +157,9 @@ impl Layer for ImageLayer {
     }
 
     /// Get size of the segment
-    fn get_seg_size(&self, _lsn: Lsn) -> Result<u32> {
+    fn get_seg_size(&self, lsn: Lsn) -> Result<u32> {
+        assert!(lsn >= self.lsn);
+
         let inner = self.load()?;
         match inner.image_type {
             ImageType::Blocky { num_blocks } => Ok(num_blocks),
@@ -166,7 +168,8 @@ impl Layer for ImageLayer {
     }
 
     /// Does this segment exist at given LSN?
-    fn get_seg_exists(&self, _lsn: Lsn) -> Result<bool> {
+    fn get_seg_exists(&self, lsn: Lsn) -> Result<bool> {
+        assert!(lsn >= self.lsn);
         Ok(true)
     }
 
diff --git a/pageserver/src/layered_repository/inmemory_layer.rs b/pageserver/src/layered_repository/inmemory_layer.rs
index a32a0927ba..35c6506feb 100644
--- a/pageserver/src/layered_repository/inmemory_layer.rs
+++ b/pageserver/src/layered_repository/inmemory_layer.rs
@@ -198,6 +198,8 @@ impl Layer for InMemoryLayer {
 
     /// Does this segment exist at given LSN?
     fn get_seg_exists(&self, lsn: Lsn) -> Result<bool> {
+        assert!(lsn >= self.start_lsn);
+
         let inner = self.inner.lock().unwrap();
 
         // Is the requested LSN after the segment was dropped?
diff --git a/pageserver/src/layered_repository/layer_map.rs b/pageserver/src/layered_repository/layer_map.rs
index ea91c6be01..da27fa3ca9 100644
--- a/pageserver/src/layered_repository/layer_map.rs
+++ b/pageserver/src/layered_repository/layer_map.rs
@@ -227,15 +227,17 @@ impl LayerMap {
                 {
                     // Add only if it exists at the requested LSN.
                     if let Some(open) = &segentry.open {
-                        if open.get_end_lsn() > lsn {
+                        if open.get_end_lsn() > lsn && open.get_start_lsn() <= lsn {
                             rels.insert(reltag);
                         }
-                    } else if let Some((_k, _v)) = segentry
+                    } else if let Some((l_start_lsn, layer)) = segentry
                         .historic
                         .range((Included(Lsn(0)), Included(lsn)))
                         .next_back()
                     {
-                        rels.insert(reltag);
+                        if !layer.is_dropped() && l_start_lsn <= &lsn {
+                            rels.insert(reltag);
+                        }
                     }
                 }
             }
@@ -253,15 +255,17 @@ impl LayerMap {
             } else {
                 // Add only if it exists at the requested LSN.
                 if let Some(open) = &segentry.open {
-                    if open.get_end_lsn() > lsn {
+                    if open.get_end_lsn() > lsn && open.get_start_lsn() <= lsn {
                         rels.insert(seg.rel);
                     }
-                } else if let Some((_k, _v)) = segentry
+                } else if let Some((l_start_lsn, layer)) = segentry
                     .historic
                     .range((Included(Lsn(0)), Included(lsn)))
                     .next_back()
                 {
-                    rels.insert(seg.rel);
+                    if !layer.is_dropped() && l_start_lsn <= &lsn {
+                        rels.insert(seg.rel);
+                    }
                 }
             }
         }