The infraction is from 2019 so it's possible he missed tests in 2018 as part of this suspension.
Regardless, people need to remember how steroid/hormone cycling works. You aren't glowing 24/7. You follow the steroid cycle and then you will know when you will pass a test and when you will fail. You take the tests when you know you will be negative and dodge the ones where you might test positive.
Dwain Chambers explains all, read his interviews.