Redis version: redis-7.2.4
RedisGraph version: redisgraph-2.12.10
Operating system: Ubuntu 20.04

Q1:MATCH (n0 :L2)<-[r0 :T6]-(n1 :L3)-[r1 :T1]->(n2 :L4), (n3)<-[r2 :T2]-(n1 :L3), (n0)-[r3 :T0]->(n4 :L1), (n0 :L2)-[r4 :T4]->(n0)<-[r5 :T3]-(n5 :L3), (n6 :L0)-[r6 :T4]->(n1), (n3 :L4)-[r7 :T0]->(n7)<-[r8 :T4]-(n8 :L1), (n6 :L0)<-[r9 :T6]-(n9 :L1)<-[r10 :T0]-(n10), (n11 :L3)-[r11 :T3]->(n9)-[r12 :T3]->(n12 :L0) MATCH (n1)-[]->(n0)-[]->(n4 :L1) OPTIONAL MATCH (n13 :L1)<-[r13 :T5]-(n14 :L4)-[r14 :T0]->(n15 :L1), (n16 :L3)<-[r15 :T0]-(n15)<-[r16 :T2]-(n17 :L1), (n18 :L3)-[r17 :T5]->(n19 :L2)<-[r18 :T6]-(n16), (n20 :L2)-[r19 :T3]->(n19)-[r20 :T2]->(n21 :L4), (n18)<-[r21 :T5]-(n22), (n23 :L3)-[r22 :T3]->(n15), (n24 :L2)-[r23 :T0]->(n16) RETURN count(*)
return --2

Q2:MATCH (n7)<-[r7 :T0]-(n3 :L4)<-[r2 :T2]-(n1 :L3), (n4 :L1)<-[r3 :T0]-(n0 :L2)<-[r4 :T4]-(n0 :L2), (n0 :L2), (n7)<-[r8 :T4]-(n8 :L1), (n9 :L1)<-[r10 :T0]-(n10), (n12 :L0)<-[r12 :T3]-(n9 :L1), (n5 :L3)-[r5 :T3]->(n0 :L2)<-[r0 :T6]-(n1 :L3), (n6 :L0)-[r6 :T4]->(n1 :L3)-[r1 :T1]->(n2 :L4), (n9 :L1)-[r9 :T6]->(n6 :L0), (n11 :L3), (n11 :L3), (n9 :L1)<-[r11 :T3]-(n11 :L3) MATCH (n1)-[]->(n0)-[]->(n4 :L1) OPTIONAL MATCH (n22), (n14 :L4)-[r13 :T5]->(n13 :L1), (n15 :L1)<-[r22 :T3]-(n23 :L3), (n18 :L3), (n14 :L4)-[r14 :T0]->(n15 :L1)-[r15 :T0]->(n16 :L3), (n19 :L2)<-[r19 :T3]-(n20 :L2), (n24 :L2), (n16 :L3)<-[r23 :T0]-(n24 :L2), (n16 :L3)-[r18 :T6]->(n19 :L2), (n15 :L1), (n15 :L1)<-[r16 :T2]-(n17 :L1), (n22)-[r21 :T5]->(n18 :L3)-[r17 :T5]->(n19 :L2)-[r20 :T2]->(n21 :L4) RETURN count(*) --0
Q1 and Q2 is equivalent query, so the result should be same. But now the results of these two queries are inconsistent.

database:

database.log