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

Q1:MATCH (n0 :L0)<-[r0 :T1]-(n1 :L3)<-[r1 :T3]-(n2 :L6), (n0)<-[r2 :T1]-(n3)-[r3 :T4]->(n4 :L1), (n3)-[r4 :T4]->(n3)-[r5 :T0]->(n5 :L2), (n6 :L4)<-[r6 :T3]-(n1 :L3), (n7)<-[r7 :T2]-(n8 :L5)-[r8 :T4]->(n0), (n8 :L5)-[r9 :T4]->(n9 :L4)<-[r10 :T3]-(n10 :L2) MATCH (n3)-[]->(n3 :L1)-[]->(n5) return count(*)
return---

Q2:MATCH (n2 :L6), (n3)-[r3 :T4]->(n4 :L1), (n3)-[r2 :T1]->(n0 :L0), (n10 :L2)-[r10 :T3]->(n9 :L4), (n1 :L3)<-[r1 :T3]-(n2 :L6), (n8 :L5), (n7), (n9 :L4)<-[r9 :T4]-(n8 :L5)-[r8 :T4]->(n0 :L0), (n5 :L2)<-[r5 :T0]-(n3), (n0 :L0)<-[r0 :T1]-(n1 :L3), (n3)-[r4 :T4]->(n3), (n7)<-[r7 :T2]-(n8 :L5), (n1 :L3), (n6 :L4)<-[r6 :T3]-(n1 :L3) MATCH (n3 :L1)-[]->(n3),(n3)-[]->(n5) return count(*)
return--4
These two queries are equivalent, but their results are inconsistent, indicating a bug. The first MATCH clause is identical in both queries; the issue occurs in the second equivalent MATCH clause, where different equivalent forms of the self-loop trigger the bug.

database:

database.log