fix: ensure we poll again (#19866)

crates/net/network/src/transactions/mod.rs

@@ -1551,7 +1551,19 @@ where
             SOFT_LIMIT_COUNT_HASHES_IN_NEW_POOLED_TRANSACTIONS_BROADCAST_MESSAGE,
         ) {
             Poll::Ready(count) => {
-                count == SOFT_LIMIT_COUNT_HASHES_IN_NEW_POOLED_TRANSACTIONS_BROADCAST_MESSAGE
+                if count == SOFT_LIMIT_COUNT_HASHES_IN_NEW_POOLED_TRANSACTIONS_BROADCAST_MESSAGE {
+                    // we filled the entire buffer capacity and need to try again on the next poll
+                    // immediately
+                    true
+                } else {
+                    // try once more, because mostlikely the channel is now empty and the waker is
+                    // registered if this is pending, if we filled additional hashes, we poll again
+                    // on the next iteration
+                    let limit =
+                        SOFT_LIMIT_COUNT_HASHES_IN_NEW_POOLED_TRANSACTIONS_BROADCAST_MESSAGE -
+                            new_txs.len();
+                    this.pending_transactions.poll_recv_many(cx, &mut new_txs, limit).is_ready()
+                }
             }
             Poll::Pending => false,
         };