Apple Feedback Assistant ID: MISSING

DESCRIBE THE BUG:
I can set the value of a int slider parameter like so:

let paramAPISettings = _apiManager!.api(for: FxParameterSettingAPI_v5.self) as! FxParameterSettingAPI_v5
        
let newToken = Int32.random(in: 1...999999) // generate random token
paramAPISettings.setIntValue(newToken, toParameter: 1, at: CMTime.zero)

However, calling this code in the pluginInstanceAddedToDocument method returns the following error:

Thread 3: Swift runtime failure: Unexpectedly found nil while unwrapping an Optional value

TO REPRODUCE:
Create a int slider like so:

func addParameters() throws {
   let paramAPI = _apiManager!.api(for: FxParameterCreationAPI_v5.self) as! FxParameterCreationAPI_v5
   paramAPI.addIntSlider(withName: "token", parameterID: 1, defaultValue: 0, parameterMin: 0, parameterMax: 999999, sliderMin: 0, sliderMax: 999999, delta: 1, parameterFlags: FxParameterFlags(kFxParameterFlag_DEFAULT | kFxParameterFlag_NOT_ANIMATABLE))
}

Programmatically set its value in the pluginInstanceAddedToDocument method:

func pluginInstanceAddedToDocument() {
    let paramAPISettings = _apiManager!.api(for: FxParameterSettingAPI_v5.self) as! FxParameterSettingAPI_v5
        
    let newToken = Int32.random(in: 1...999999) // generate new token
    paramAPISettings.setIntValue(newToken, toParameter: 1, at: CMTime.zero)
}

EXPECTED BEHAVIOUR:
From Apple documentation: "The pluginInstanceAddedToDocument is called when a new plug-in instance is created or a document is loaded and an existing instance is deserialized. When the host calls this method, the plug-in is a part of the document and the various API objects work as expected."

Retrieving the value of the parameter works as expected using the FxParameterRetrievalAPI_v6 protocol, I'm wondering why FxParameterSettingAPI_v5.setIntValue doesn't.

I'm quite new to FxPlugs and swift development, maybe I'm missing something.

SCREENSHOTS:
N/A

SPECS:

• 2021 14-inch MacBook Pro (M1 Max, 32GB RAM, 2TB SSD)
• macOS Sonoma 14.3
• Final Cut Pro 10.7.1
• Motion 5.7

ADDITIONAL COMMENTS:
I tried to set the parameter value from a pushbutton event, it worked. The issue occurs when using the pluginInstanceAddedToDocument method.