It happens in all versions (Boron/Carbon/Nitrogen/Master)
Steps to reproduce
1. Start a 3 node cluster
2. Transactions (car tests) succeeds.
3. Stop all 3 nodes
4. Start 2 nodes
5. Try car tests (It fails) (karaf logs show errors that car tests failed)

Note:- We checked step 5 after considerable amount of time after step 4.