Need help with why 'senza sordino' not working

[Eggsalad]

As @DanielMuzMurray said, it’s much easier to help if you can upload a minimal project.

Also, here’s info about how switches are selected:

Expression Maps: How are switches selected?

This is a complex area, and even though I’ve read through the code to provide you with this answer, I wouldn’t be confident that I have captured every possible subtlety. Dorico builds up a timeline of the playback techniques required for a particular instrument (or even an individual voice, if independent voice playback is active). Playback techniques are usually given rise to by playing technique items in the music, but can also be produced by dynamics and articulations. As it builds up the t…