I have two bugs to report:
1) In the music editor, holding SHIFT + Dragging the mouse will select multiple notes at once with the Arrow Tool. Pretty basic. But the same action won't deselect selected notes. It may never have been coded to, so from a code standpoint it may be seen as a feature. But I'd call that an oversight in how it was coded in the first place (I've made plenty myself, so no offense). Given the very nature of the Arrow tool feature to hold shift and Select in the first place, Select/Deselect go hand in hand as one feature IMO.
2) In the music editor, use the Arrow Tool to drag and select notes (without the shift key). If you click within the range of one beat, notes from neighboring beats are often selected as well. I noticed an automatic snap feature when zoomed in, but this is not contextually part of the problem. It's still inconsistently highlight notes I don't intend to highlight.
Some extra thoughts:
Note: I argue these should be reversed. By default, highlighting notes should do exactly what I'm doing with my mouse. Shift should lock my mouse to the grid, not the other way around. I believe that's inherently more intuitive from what users expect moving from one type of software to the next. S1 seems less standard in this regard.
I know these may sound like small concerns. But it is after all a very high level tool in the program. Sometimes things we don't even notice affect our user experience. While I'm not sure most people consciously notice these things, I believe they are certainly relevant and worth making more consistent. I'm drawing a fine line between bug and feature request here. Sorry. ;)
ASUS X99-A, i7 5820k, Win10 x64, Studio One v188.8.131.52707
RME HDSP AIO, Driver 4.14 (latest, pub. on 1/29/2016)