Bug Report: Hold notes don't exactly work when guitar sustain is on

For some doggone reason, whenever I hit a hold note with this option active, even when I hit a Sick!, the rest of the note decides to disappear into the aether 90% of the time, usually on hard songs like M.I.L.F. Might be because I am using a Laptop, but still, odd thing that happens that will ruin an FC!