Adding ties to drum kit notes produces incorrect notes

To reproduce:
1. Create a score with a drum kit
2. Enter any drum using note input keyboard shortcuts (eg "A" for snare)
3. Use the key-bind "+" to extend the note by adding a tie

Expected result:
The note is extended correctly, resulting in a tie on the correct drum

Actual result:
A note that has the intended length is added, but it is always pitched as a splash cymbal, regardless of the previous note.