Looking at the module, it seems to be failing for just about everyone, according to the test reports.
My guess from the error message is that it's starting tests in separate threads, and some later tests are taking less time than earlier ones. When they complete, that's printing the test results out of order, which is causing the failure.
That probably just means the tests are bad, rather than the code itself, and you can do force install Thread::Conveyor::Monitored
to bypass the testing.