Slurs removed when grouping grid instruments

I created a notation on a 5-line staff using the built-in congas drum kit. The notation has slurs between notes. I wanted to try and change the layout from 5-line staff to grid notation. When I grouped the congas together in Setup -> Edit Percussion Kit -> Grid, the expected layout was achieved but I then lost the slurs between notes.

I’ve attached the project but I’m not sure it will be of much help because the above steps need to be reproduced. Thanks in advance for any help.grid-format-loses-slurs.dorico (513.0 KB)

Yes, changing the kit presentation type will cause slurs to be removed if the disposition of voices is different. I’m afraid you’ll need to re-add them.

Thank you very much for the quick reply.