Our tests ran successfully with 5.6.28-25.14.1, but failed in the same way as the OP's did on 5.6.37-26.21.1 and 5.6.36-26
Our tests ran successfully with 5.6.28-25.14.1, but failed in the same way as the OP's did on 5.6.37-26.21.1 and 5.6.36-26