AutoLogin not working with ng build --prod

I'm trying to implement Anchor and Wax login with UAL in an angular app. Everything works fine except when I refresh my page UAL is unable to find the logged in user from session. This is happening because 'ual-session-authenticator' is not saved. The value for 'ual-session-authenticator' in localStorage is always null because it is saved by ```localStorage.setItem(UALJs.SESSION_AUTHENTICATOR_KEY, authenticator.constructor.name);```
in UALJs . And on page refresh when it tries to find the session authenticator it couldnt because it also uses
```const sessionAuthenticator = authenticators.find((authenticator) => authenticator.constructor.name === authenticatorName);```

This only happens with ```ng serve --prod --sourceMap``` and ```ng build --prod```. Dev build ```ng serve``` works fine. Angular uglify class names for prod builds.
A better way is to use instanceof instead of constructor.name

Angular CLI: 11.0.5
Node: 14.15.0
OS: win32 x64

Angular: 11.0.5
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router
Ivy Workspace: Yes

Package Version
---------------------------------------------------------
@angular-devkit/architect 0.1100.5
@angular-devkit/build-angular 0.1100.5
@angular-devkit/core 11.0.5
@angular-devkit/schematics 11.0.5
@schematics/angular 11.0.5
@schematics/update 0.1100.5
rxjs 6.6.3
typescript 4.0.3