diff --git a/src/side_chain.cpp b/src/side_chain.cpp
index 6cc81b3..e34c2d4 100644
--- a/src/side_chain.cpp
+++ b/src/side_chain.cpp
@@ -602,13 +602,21 @@ bool SideChain::add_external_block(PoolBlock& block, std::vector<hash>& missing_
 			", mainchain height = " << block.m_txinGenHeight
 		);
 
+		bool not_enough_pow = true;
+
 		// Calculate the same hash second time to check if it's an unstable hardware that caused this
 		hash pow_hash2;
 		if (block.get_pow_hash(m_pool->hasher(), block.m_txinGenHeight, seed, pow_hash2, true) && (pow_hash2 != pow_hash)) {
 			LOGERR(0, "UNSTABLE HARDWARE DETECTED: Calculated the same hash twice, got different results: " << pow_hash << " != " << pow_hash2 << " (sidechain id = " << block.m_sidechainId << ')');
+			if (block.m_difficulty.check_pow(pow_hash2)) {
+				LOGINFO(3, "add_external_block second result has enough PoW for height = " << block.m_sidechainHeight << ", id = " << block.m_sidechainId);
+				not_enough_pow = false;
+			}
 		}
 
-		return false;
+		if (not_enough_pow) {
+			return false;
+		}
 	}
 
 	bool block_found = false;