When you split audio items, you may have pops at the end and at the beginning of the cut. To prevent them one should listen the audio and create fades if necessary.
This is not a very-very big deal, but competitors have this problem covered. Namely, Reaper has this solved and the user just deals with the parts without any need to listen and create auto-fades in the place of item split (it actually can be disabled by the user by a 'Auto-crossfade enabled' menu button). This is very handy for all the users of split-based editing (sometimes it's easier just to cut the part with a pop or a click than to use Melodyne for that, or you need to move one of the parts – there are some use cases, not limited to those).
I've tried to get that behaviour either manually or with macros and failed. https://forums.presonus.com/viewtopic.php?f=152&t=22904&sid=9b2332c00641fe69d3e2f496b564cd16
is close, but I was not able to solve several problems with it (too big autofades and cursor jumping); `Create Autofades' just does some other thing and doesn't help to solve this case.
I've contacted the technical support and they say, there is no way to automatically generate fade in and out in the place of splitting with Studio One that they're aware of and I should write the FR. I think, that's an important feature that actually prevents some friends of mine from using Studio One for mastering, so here it is. :-)