Angularfire2 doc.update callback doesnt run

Ionic Framework ionic-v3
1

Hi

I have this code:
try {
this._FS.collection(“mycollection”).doc(“supermegaid”).update({state:8}).then(()=>{
console.log(“OK update FS”);

  }).catch(err=>{
    console.log("KO update FS", JSON.stringify(err));
  });
} catch (error) {
  console.log("KO 2 update FS", JSON.stringify(error));
}
  
  console.log("finish update FS");

The result of update promise never exceute, can anyone tell me what i’m missing?

Env info;
Ionic:

ionic (Ionic CLI) : 4.1.1 (C:\Users\DCB\AppData\Roaming\npm\node_modules\ionic)
Ionic Framework : ionic-angular 3.9.2
@ionic/app-scripts : 3.1.8

Cordova:

cordova (Cordova CLI) : 8.0.0
Cordova Platforms : android 7.1.1
Cordova Plugins : cordova-plugin-ionic-keyboard 2.1.2, cordova-plugin-ionic-webview 1.2.1, (and 4 other plugins)

System:

Android SDK Tools : 26.1.1 (C:\Users\DCB\AppData\Local\Android\Sdk)
NodeJS : v10.8.0 (C:\Program Files\nodejs\node.exe)
npm : 6.3.0
OS : Windows 10

Thanks