its often the lyric entering and basic note edits that lead me to crash in synth v :/ which is annoying because its the most basic thing to do in the software and i run into not issues with vocaloid. i do think synth v has some good doing for it in terms of voice banks advancements but its quite behind in terms of focusing on just being stable. of course vocaloid has many years on it in terms of being refined and fixed by a higher budget developer team, but im surprised i havent seen more complaints for synth v