Finale v27.1.0.277

When I compose for Gehu and Bass Gehu, the pizzicato effect cannot be played even I checked the Human Playback and change the sound of the Gehu and Bass Gehu to Cello and Double Bass. I solve this problem by using cello section and Contrabass section instrument to replace the Gehu and Bass Gehu instrument. But I have another problem, when I type Arco, it cannot switch to Arco. Please help me to solve this problem. Thanks!

I hope the technian could solve this bug. Thanks.