I think there might be 3 case here, either:
- It's drawn with the [Pitch Pen] on the Piano Roll
- It's drawn using [Anchor Tool] on the Piano Roll
- It's drawn on [PIT] Parameter on the Parameter Line
For 1 and 3, you need to manually reset it by:
- Using the [Pitch Pen] tool
2a. Manually delete the tuning by right click and drag from the start of the note until the end
2b. For the [PIT] Parameter, right click and drag from the start to end
For 2, you need to manually reset it by:
- Using the [Anchor Tool]
- Manually delete the tuning by right click and drag from the start of the note until the end