I have seen this question asked several times in forums, and I used to have this issue too. It is a bummer not to have digital output when normally that’s the whole reason why you buy a DAC!
The solution is simple but a little bit of a nuisance: Connect the FiiO Andes to your laptop before you turn it on!. If you disconnect it and reconnect it while the computer is on, your digital output will not come back until next time you restart your pc.
If you put your computer into hibernation because you have applications you don’t want to close, as long as you keep the DAC connected until the computer hibernates, and you connect it back before waking up the laptop, your digital output will still be available.