Android icon breaks on release build with Cordova Android ^8.0.0

Ionic 3 with Cordova Android 8.1.0

When I reinstall the Cordova Android platform and run the code on a device, the home screen icon works fine.
When I build the code with the --release flag, and run it on a newer Android device, the home screen icon shows a generic Android icon.

Ionic info:

cli packages: (/usr/local/lib/node_modules)

    @ionic/cli-utils  : 1.19.2
    ionic (Ionic CLI) : 3.20.0

global packages:

    cordova (Cordova CLI) : 9.0.0 (cordova-lib@9.0.1) 

local packages:

    @ionic/app-scripts : 3.2.4
    Cordova Platforms  : android 8.1.0 browser 5.0.4 ios 5.1.1
    Ionic Framework    : ionic-angular 3.9.9

System:

    ios-deploy : 1.9.2 
    ios-sim    : 6.1.3 
    Node       : v8.11.1
    npm        : 5.6.0 
    OS         : macOS
    Xcode      : Xcode 11.2.1 Build version 11B500 

Environment Variables:

    ANDROID_HOME : not set

Misc:

    backend : pro