bug: Ionic app not run IOS 15.5

[diendv]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Ionic Framework Version

v8.x

Current Behavior

Problems with white screen after splash screen on iphone use ios 15.5

Expected Behavior

Help me find the cause and fix this error

Steps to Reproduce

Turn on the app

Code Reproduction URL

no link

Ionic Info

"@angular/animations": "^18.0.0",
"@angular/common": "^18.0.0",
"@angular/compiler": "^18.0.0",
"@angular/core": "^18.0.0",
"@angular/forms": "^18.0.0",
"@angular/platform-browser": "^18.0.0",
"@angular/platform-browser-dynamic": "^18.0.0",
"@angular/router": "^18.0.0",
"@capacitor/app": "6.0.1",
"@capacitor/browser": "^6.0.2",
"@capacitor/camera": "^6.0.2",
"@capacitor/core": "6.1.2",
"@capacitor/filesystem": "^6.0.1",
"@capacitor/haptics": "6.0.1",
"@capacitor/ios": "6.1.2",
"@capacitor/keyboard": "6.0.2",
"@capacitor/local-notifications": "^6.1.0",
"@capacitor/push-notifications": "^6.0.2",
"@capacitor/screen-orientation": "^6.0.2",
"@capacitor/share": "^6.0.2",
"@capacitor/splash-screen": "^6.0.2",
"@capacitor/status-bar": "^6.0.1",
"@ionic/angular": "^8.0.0",
"@ionic/storage-angular": "^4.0.0",
"@types/lodash": "^4.17.10",
"highcharts": "^11.4.8",
"ionicons": "^7.2.1",
"lodash": "^4.17.21",
"luxon": "^3.5.0",
"ng2-file-upload": "^7.0.1",
"rxjs": "~7.8.0",
"swiper": "^8.4.5",
"tslib": "^2.3.0",
"zone.js": "~0.14.2"

Additional Information

No response

[diendv]

[stnedelchev-fadv]

Keep in mind that Angular officially supports the last 2 major versions of iOS and Safari: https://angular.dev/reference/versions#browser-support
15.5 doesn't fit into that category and Angular will only include polyfills down to the version it supports. If you open the JS console you'll probably see exceptions being thrown due to invalid syntax or usage of feature that doesn't exist. You can try adding a custom browserslist file and specify last 4 major versions of iOS (and the same for Safari) and see if the build makes a difference.