diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 3b0c5dc96..3cbe83ef2 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -2455,7 +2455,7 @@ void wallet2::process_parsed_blocks(uint64_t start_height, const std::vector<cry
         " (height " + std::to_string(start_height) + "), local block id at this height: " +
         string_tools::pod_to_hex(m_blockchain[current_index]));
 
-      detach_blockchain(current_index);
+      detach_blockchain(current_index, output_tracker_cache);
       process_new_blockchain_entry(bl, blocks[i], parsed_blocks[i], bl_id, current_index, tx_cache_data, tx_cache_data_offset, output_tracker_cache);
     }
     else
@@ -3047,7 +3047,7 @@ void wallet2::refresh(bool trusted_daemon, uint64_t start_height, uint64_t & blo
 
       // if we've got at least 10 blocks to refresh, assume we're starting
       // a long refresh, and setup a tracking output cache if we need to
-      if (m_track_uses && !output_tracker_cache && next_blocks.size() >= 10)
+      if (m_track_uses && (!output_tracker_cache || output_tracker_cache->empty()) && next_blocks.size() >= 10)
         output_tracker_cache = create_output_tracker_cache();
 
       // switch to the new blocks from the daemon
@@ -3188,7 +3188,7 @@ bool wallet2::get_rct_distribution(uint64_t &start_height, std::vector<uint64_t>
   return true;
 }
 //----------------------------------------------------------------------------------------------------
-void wallet2::detach_blockchain(uint64_t height)
+void wallet2::detach_blockchain(uint64_t height, std::map<std::pair<uint64_t, uint64_t>, size_t> *output_tracker_cache)
 {
   LOG_PRINT_L0("Detaching blockchain on height " << height);
 
@@ -3210,6 +3210,15 @@ void wallet2::detach_blockchain(uint64_t height)
     }
   }
 
+  for (transfer_details &td: m_transfers)
+  {
+    while (!td.m_uses.empty() && td.m_uses.back().first >= height)
+      td.m_uses.pop_back();
+  }
+
+  if (output_tracker_cache)
+    output_tracker_cache->clear();
+
   auto it = std::find_if(m_transfers.begin(), m_transfers.end(), [&](const transfer_details& td){return td.m_block_height >= height;});
   size_t i_start = it - m_transfers.begin();
 
diff --git a/src/wallet/wallet2.h b/src/wallet/wallet2.h
index f2e7952c7..28ebd6704 100644
--- a/src/wallet/wallet2.h
+++ b/src/wallet/wallet2.h
@@ -1281,7 +1281,7 @@ namespace tools
     bool load_keys(const std::string& keys_file_name, const epee::wipeable_string& password);
     void process_new_transaction(const crypto::hash &txid, const cryptonote::transaction& tx, const std::vector<uint64_t> &o_indices, uint64_t height, uint64_t ts, bool miner_tx, bool pool, bool double_spend_seen, const tx_cache_data &tx_cache_data, std::map<std::pair<uint64_t, uint64_t>, size_t> *output_tracker_cache = NULL);
     void process_new_blockchain_entry(const cryptonote::block& b, const cryptonote::block_complete_entry& bche, const parsed_block &parsed_block, const crypto::hash& bl_id, uint64_t height, const std::vector<tx_cache_data> &tx_cache_data, size_t tx_cache_data_offset, std::map<std::pair<uint64_t, uint64_t>, size_t> *output_tracker_cache = NULL);
-    void detach_blockchain(uint64_t height);
+    void detach_blockchain(uint64_t height, std::map<std::pair<uint64_t, uint64_t>, size_t> *output_tracker_cache = NULL);
     void get_short_chain_history(std::list<crypto::hash>& ids, uint64_t granularity = 1) const;
     bool clear();
     void clear_soft(bool keep_key_images=false);