We heard from many users that they have to re-assign the phrases every time they open their project again, this happens when you don't create a MIDI note for the phrase/style you want to use. The phrases will not be saved in your project when you don't put a midi note under the actual phrase.
Virtual Guitarist - CARBON
Virtual Bassist - DANDY
Here is an example of how it should look like in your Piano Roll:
Piano Roll Studio One 5
Without the MIDI transaction for style and common phrases, the plug-in will not save the phrases that you have played on your MIDI keyboard or clicked on with your mouse. You can find the Common and Style phrases between the notes ''C0-B2'' and the play range is mostly between ''C3-F3'', depending on your DAW this can have different ranges.