Route line disappears after changing style during active guidance.

[MaximAlien]

Mapbox Navigation SDK version: main

Steps to reproduce

To reproduce the issue add code, which allows to change the style. For example:

let timer = Timer.scheduledTimer(timeInterval: 1.0,
                                 target: self,
                                 selector: #selector(changeStyle),
                                 userInfo: nil,
                                 repeats: true)
timer.fire()

@objc func changeStyle() {
    if styleManager?.currentStyleType == .day {
        styleManager?.applyStyle(type: .night)
    } else {
        styleManager?.applyStyle(type: .day)
    }
}

1. Start example application.
2. Request route and start active guidance navigation.
3. Observe behavior.

Expected behavior

Route line should not disappear when style changes.

Actual behavior

After first change of style route line disappears.

Example:
https://user-images.githubusercontent.com/1496498/124120326-803d9a80-da28-11eb-8323-91a0e1b2570c.mov