[bug] System Tray is not cleaned up on exit in v1.1

[wkl007]

1.0.ok.mp4

1.1.error.mp4

code url:
https://github.com/wkl007/tauri-plugin-single-instance

Cargo.toml:

[package]
name = "emit-event-app"
version = "0.1.0"
description = "A Tauri App"
authors = ["You"]
repository = ""
edition = "2021"
rust-version = "1.57"

[dependencies]
serde_json = "1.0"
serde = { version = "1.0", features = ["derive"] }
tauri = { version = "1.1.1", features = ["api-all", "cli", "system-tray"] }
tauri-plugin-single-instance = { path = "../../../" }

[build-dependencies]
tauri-build = { version = "1.1.1", features = [] }

[features]
default = ["custom-protocol"]
custom-protocol = ["tauri/custom-protocol"]