issue using group to load fixtures with that preset

There is Still issue with latest version when using the group feature to load fixtures with a certain palette in this case “guitar”.
I have used 16 fixtures with each fixture on a musician position palette ,then when I use the group feature to load fixture with that palette i always have a fixutre that does not have that palette but another one why? in my case when i use group to load guitar fixtures i have also 1 fixture that uses singer palette! why?