diff --git i/src/validation.cpp w/src/validation.cpp
index c12dc9e8b6..84f99312b0 100644
--- i/src/validation.cpp
+++ w/src/validation.cpp
@@ -2842,12 +2842,18 @@ static void LimitValidationInterfaceQueue() LOCKS_EXCLUDED(cs_main) {
 
     if (GetMainSignals().CallbacksPending() > 10) {
         SyncWithValidationInterfaceQueue();
     }
 }
 
+void CChainState::foo()
+{
+    BlockValidationState state;
+    InvalidateBlock(state, nullptr);
+}
+
 bool CChainState::ActivateBestChain(BlockValidationState& state, std::shared_ptr<const CBlock> pblock)
 {
     AssertLockNotHeld(m_chainstate_mutex);
 
     // Note that while we're often called here from ProcessNewBlock, this is
     // far from a guarantee. Things in the P2P/RPC will often end up calling
@@ -2858,12 +2864,14 @@ bool CChainState::ActivateBestChain(BlockValidationState& state, std::shared_ptr
     // ABC maintains a fair degree of expensive-to-calculate internal state
     // because this function periodically releases cs_main so that it does not lock up other threads for too long
     // during large connects - and to allow for e.g. the callback queue to drain
     // we use m_chainstate_mutex to enforce mutual exclusion so that only one caller may execute this function at a time
     LOCK(m_chainstate_mutex);
 
+    foo();
+
     CBlockIndex *pindexMostWork = nullptr;
     CBlockIndex *pindexNewTip = nullptr;
     int nStopAtHeight = gArgs.GetIntArg("-stopatheight", DEFAULT_STOPATHEIGHT);
     do {
         // Block until the validation queue drains. This should largely
         // never happen in normal operation, however may happen during
diff --git i/src/validation.h w/src/validation.h
index fb258005f1..ec2c3b5f00 100644
--- i/src/validation.h
+++ w/src/validation.h
@@ -743,12 +743,14 @@ private:
 
     /** Check warning conditions and do some notifications on new chain tip set. */
     void UpdateTip(const CBlockIndex* pindexNew)
         EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
 
     friend ChainstateManager;
+
+    void foo();
 };
 
 /**
  * Provides an interface for creating and interacting with one or two
  * chainstates: an IBD chainstate generated by downloading blocks, and
  * an optional snapshot chainstate loaded from a UTXO snapshot. Managed