Tests fail sometimes after running multiple times

[adzialocha]

Describe the bug

When I run the tests (only the Token > Transitive Transactions > should send Circles to someone transitively test) several times with the docker deployment, the 3rd or 4th time the test fails with this error:

RequestError: Request failed @ http://relay.circles.local/api/v2/safes/0x514c97a4fa711D4f2B55354FEf4454F05C07D6b1/transactions/estimate/ with error 422

Therefore, I restart the docker containers and tests run well again:

make ENV=backend down
docker volume prune -f
make ENV=backend up 
make ENV=backend contracts
make ENV=backend subgraph
make ENV=backend up # sometimes circles-api-worker is down