indexeddb lost when updating app from cordova-android 9 to cordova-android 11

Hi,

We have an app that's currently on app/play store and uses cordova-android 9.
We created new version of the app with cordova-android 11 (to align with google requirements).
When we do the update from store version to new version, all storage data is lost.
Any idea what could be the problem?

We're using storage like this:
` IonicStorageModule.forRoot({
driverOrder: ['indexeddb', 'sqlite', 'websql']
}),
`

Dependencies:

"dependencies": {
"@angular/common": "~7.2.2",
"@angular/core": "~7.2.2",
"@angular/forms": "~7.2.2",
"@angular/http": "~7.2.2",
"@angular/platform-browser": "~7.2.2",
"@angular/platform-browser-dynamic": "~7.2.2",
"@angular/router": "~7.2.2",
"@ionic-native/android-permissions": "^5.13.0",
"@ionic-native/app-version": "^5.13.0",
"@ionic-native/camera": "^5.13.0",
"@ionic-native/clipboard": "^5.14.0",
"@ionic-native/contacts": "^5.14.0",
"@ionic-native/core": "^5.27.0",
"@ionic-native/deeplinks": "^5.26.0",
"@ionic-native/device": "^5.14.0",
"@ionic-native/diagnostic": "^5.13.0",
"@ionic-native/document-viewer": "^5.13.0",
"@ionic-native/file": "^5.13.0",
"@ionic-native/file-opener": "^5.13.0",
"@ionic-native/firebase": "5.10.0",
"@ionic-native/firebase-analytics": "^5.34.0",
"@ionic-native/http": "^5.18.0",
"@ionic-native/in-app-browser": "^5.13.0",
"@ionic-native/ionic-webview": "^5.13.0",
"@ionic-native/keyboard": "^5.13.0",
"@ionic-native/keychain-touch-id": "^5.22.0",
"@ionic-native/network": "^5.10.0",
"@ionic-native/open-native-settings": "^5.15.0",
"@ionic-native/photo-viewer": "^5.15.0",
"@ionic-native/social-sharing": "^5.31.1",
"@ionic-native/splash-screen": "~5.0.0",
"@ionic-native/sqlite": "^5.28.0",
"@ionic-native/status-bar": "~5.0.0",
"@ionic-native/toast": "5.10.0",
"@ionic/angular": "^4.11.4",
"@ionic/core": "^4.11.4",
"@ionic/storage": "2.2.0",
"@ngx-translate/core": "11.0.1",
"@ngx-translate/http-loader": "4.0.0",
"@types/marked": "^4.0.3",
"@types/node-forge": "^0.10.10",
"big-integer": "^1.6.48",
"buffer": "^6.0.3",
"canvas-confetti": "^1.4.0",
"chart.js": "^2.7.2",
"cordova-android": "11.0.0",
"cordova-android-support-gradle-release": "^3.0.1",
"cordova-clipboard": "^1.3.0",
"cordova-custom-config": "^5.1.0",
"cordova-ios": "^6.2.0",
"cordova-open-native-settings": "^1.5.2",
"cordova-plugin-add-swift-support": "^2.0.2",
"cordova-plugin-android-permissions": "^1.0.2",
"cordova-plugin-androidx": "3.0.0",
"cordova-plugin-androidx-adapter": "^1.1.1",
"cordova-plugin-app-version": "^0.1.9",
"cordova-plugin-camera": "^4.1.0",
"cordova-plugin-device": "^2.0.3",
"cordova-plugin-document-viewer": "^0.9.13",
"cordova-plugin-file-opener2": "^2.2.1",
"cordova-plugin-inappbrowser": "^4.0.0",
"cordova-plugin-ionic-keyboard": "file:cordova-plugin-ionic-keyboard",
"cordova-plugin-ionic-webview": "^5.0.0",
"cordova-plugin-network-information": "^2.0.2",
"cordova-plugin-splashscreen": "^6.0.2",
"cordova-plugin-sslcertificatechecker": "^6.0.0",
"cordova-plugin-statusbar": "^2.4.3",
"cordova-plugin-x-socialsharing": "6.0.4",
"cordova-plugin-x-toast": "^2.7.2",
"cordova-sqlite-storage": "~5.0.1",
"cordova.plugins.diagnostic": "^5.0.2",
"core-js": "~2.5.4",
"d3": "3.5.5",
"hammerjs": "^2.0.8",
"html-to-image": "^1.9.0",
"ionic": "^4.12.0",
"ionic-plugin-deeplinks": "1.0.19",
"ionicons": "^4.6.3",
"marked": "^4.0.18",
"moment": "2.24.0",
"ng2-validation": "^4.2.0",
"ngx-moment": "^3.4.0",
"node-forge": "^0.10.0",
"npm": "6.10.2",
"replace": "^1.2.1",
"rxjs": "6.5.2",
"skwas-cordova-plugin-datetimepicker": "^2.1.2",
"swissqrbill": "3.2.0",
"tslib": "^2.0.1",
"zone.js": "~0.8.29"
},

Bắt đầu với cấu hình IonicStorageModule.forRoot và thứ tự các driver indexeddb, sqlite và websql được mô tả trong issue. Nội dung mô tả không nêu tên tệp mã nguồn hoặc các bài kiểm thử; để hoàn thành, cần tái hiện quá trình nâng cấp từ cordova-android 9 lên 11 và xác định lý do storage hiện có không còn khả dụng sau đó.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.