diff --git a/src/erasure.rs b/src/erasure.rs
index 6cb9090e20..d58d0dcdde 100644
--- a/src/erasure.rs
+++ b/src/erasure.rs
@@ -303,15 +303,13 @@ pub fn recover(
     start: usize,
     num_blobs: usize,
 ) -> Result<()> {
-    let num_blocks = num_blobs / NUM_DATA;
+    let num_blocks = (num_blobs / NUM_DATA) + 1;
     let mut block_start = start - (start % NUM_DATA);
 
-    if num_blocks > 0 {
-        debug!(
-            "num_blocks: {} start: {} num_blobs: {} block_start: {}",
-            num_blocks, start, num_blobs, block_start
-        );
-    }
+    debug!(
+        "num_blocks: {} start: {} num_blobs: {} block_start: {}",
+        num_blocks, start, num_blobs, block_start
+    );
 
     for _ in 0..num_blocks {
         let mut data_missing = 0;
diff --git a/src/streamer.rs b/src/streamer.rs
index b975a2422d..ddf49a7adc 100644
--- a/src/streamer.rs
+++ b/src/streamer.rs
@@ -298,6 +298,40 @@ fn retransmit_all_leader_blocks(
     Ok(())
 }
 
+/// make space in window for newly received blobs that come after
+///  consumed, before received, clear any old ones
+fn reset_slots(
+    window: &mut [WindowSlot],
+    recycler: &BlobRecycler,
+    consumed: u64,
+    received: u64,
+    debug_id: u64,
+) {
+    for ix in consumed..received {
+        let k = (ix % WINDOW_SIZE) as usize;
+
+        let mut old = false;
+        if let Some(b) = &window[k].data {
+            old = b.read().unwrap().get_index().unwrap() < consumed;
+        }
+        if old {
+            if let Some(b) = mem::replace(&mut window[k].data, None) {
+                debug!("{:x}: recycling data blob at index {:}", debug_id, k);
+                recycler.recycle(b);
+            }
+        }
+        if let Some(b) = &window[k].coding {
+            old = b.read().unwrap().get_index().unwrap() < consumed;
+        }
+        if old {
+            if let Some(b) = mem::replace(&mut window[k].coding, None) {
+                debug!("{:x}: recycling coding blob at index {:}", debug_id, k);
+                recycler.recycle(b);
+            }
+        }
+    }
+}
+
 /// process a blob: Add blob to the window. If a continuous set of blobs
 ///      starting from consumed is thereby formed, add that continuous
 ///      range of blobs to a queue to be sent on to the next stage.
@@ -326,30 +360,11 @@ fn process_blob(
 ) {
     let mut window = window.write().unwrap();
 
-    // Search the window for old blobs in the window
-    // of consumed to received and clear any old ones
-    for ix in *consumed..(received + 1) {
-        let k = (ix % WINDOW_SIZE) as usize;
-
-        let mut old = false;
-        if let Some(b) = &window[k].data {
-            old = b.read().unwrap().get_index().unwrap() < *consumed;
-        }
-        if old {
-            if let Some(b) = mem::replace(&mut window[k].data, None) {
-                debug!("{:x}: recycling data blob at index {:}", debug_id, k);
-                recycler.recycle(b);
-            }
-        }
-        if let Some(b) = &window[k].coding {
-            old = b.read().unwrap().get_index().unwrap() < *consumed;
-        }
-        if old {
-            if let Some(b) = mem::replace(&mut window[k].coding, None) {
-                debug!("{:x}: recycling coding blob at index {:}", debug_id, k);
-                recycler.recycle(b);
-            }
-        }
+    if pix == received {
+        // When pix == received, we've *just* updated received, which means
+        //  possibly new slots between consumed and received have been exposed,
+        //  so clean up old blobs between consumed and received
+        reset_slots(&mut window, recycler, *consumed, received, debug_id);
     }
 
     let is_coding = {
@@ -405,17 +420,20 @@ fn process_blob(
     //    }
 
     // push all contiguous blobs into consumed queue, increment consumed
-    while *consumed < received {
+    loop {
         let k = (*consumed % WINDOW_SIZE) as usize;
-        trace!("k: {} consumed: {}", k, *consumed);
+        trace!("k: {} consumed: {} received: {}", k, *consumed, received);
 
-        if window[k].data.is_none() {
+        if let Some(blob) = &window[k].data {
+            if blob.read().unwrap().get_index().unwrap() < *consumed {
+                // window wrap-around, end of received
+                break;
+            }
+        } else {
+            // window[k].data is None, end of received
             break;
         }
 
-        if let Some(blob) = &window[w].data {
-            assert!(blob.read().unwrap().meta.size < BLOB_SIZE);
-        }
         consume_queue.push_back(window[k].data.clone().expect("clone in fn recv_window"));
         *consumed += 1;
     }