Problems with icon when generatin app apk

Summary

VBCS icons are not being displayed when running the app in a phone, only in the emulator.

Content

Hello All,

I am having an issue where the icons in a oj-ext-mobile-navigation-bar-bottom component are not displayed when I run the generated apk in my phone, but when previewing the application in the emulator this issue does not happen.

The snippet attached is the app-flow.json page of my application.

Would appreciate if someone could point me to what I am doing wrong/missing.

Version

21.10.0

Code Snippet

{
  "id": "expenses",
  "description": "A new VB app",
  "defaultPage": "applogin",
  "chains": {
    "hideSpinner": {
      "description": "Hides the application loading screen shown immediately after the splash screen is dismissed.",
      "root": "hideSpinner",
      "actions": {
        "hideSpinner": {
          "module": "vb/action/builtin/callModuleFunctionAction",
          "parameters": {
            "module": "{{ $application.functions }}",