I think what you can possibly do is make a registration wherein you make the style volume as zero and select any of the A B C or D as style part playing. Mutipad volume in the registration should be normal.
So after you hit the end, but before the style actually stops, you press this registration which lets the style play with zero volume. Also, the benefit of this would be that the multipad will continue playing in the same chord, because if you fully stop the style, and start mutipad, it will start from Chord C and you have to set it right again.
Regards
Anand