MR COX. YMMV.
has your pc ever been optimised for studio work ?
IF NOT it could be many possible reasons.
read these optimisation links includeing power management aspects. best bet if your not au fait with pc tech get a qualified pc tech to read these links before doing anything. tread carefully re any pc changes.
it might be simple it might not.
pay carefull attention also to running dpc latency check mentioned in first link. low dpc figures are important for studio work.
here are some optimisation links for your pc tech /IT guy.
https://audient.com/tutorial/optimise-your-windows-pc-for-audio/https://support.focusrite.com/hc/en-gb/articles/207355205-Optimising-your-PC-for-Audio-on-Windows-10https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=654005see you tube for even more optimising tips. HTH//ymmv.
frankly i would contact presonus support.
scouring useing google i noticed people with audiobox sometimes had an issue.
just google presonus audiobox goes to sleep (what model do you have ?)
without details of your rig and its various settings in win and the audiobox control panel for recording and playback (post pics of settings please )its difficult to comment further.
one possible means of resolution is to try a different sound device and see if same problem happens.
best
ex tech oldmuso.