Rxjs subscriptions do not work in IE 11 with Angular 10.1.1 and rxjs 6.6.3

After upgrading from Angular 10.0.1 to 10.1.1 IE 11 stopped working. Any try to subscribe (rxjs ^6.6.3) to even the simplest http request throws the error: "TypeError: Invalid calling object". Chrome works fine. Please help!

service.ts

test() {
    const apiHeader = new HttpHeaders()
        .set('Content-Type', 'application/json')
        .set('cache-control', 'no-cache');

    const url = decodeURIComponent(`https://.../api/test/test`);
    return this.http.get<any>(url);
}

app.component.ts

  ngOnInit() {
    this.myService.test()
      .pipe(take(1))
      .subscribe(data => {
        console.log('ngOnInit', data)

      },
        err => {
          console.log('err', err)
        });
  }

package.json

  "dependencies": {
    "@angular/animations": "~10.1.1",
    "@angular/cdk": "~10.2.0",
    "@angular/common": "~10.1.1",
    "@angular/compiler": "~10.1.1",
    "@angular/core": "^10.1.1",
    "@angular/forms": "10.1.1",
    "@angular/localize": "^10.1.1",
    "@angular/material": "^10.2.0",
    "@angular/material-moment-adapter": "^10.2.0",
    "@angular/platform-browser": "~10.1.1",
    "@angular/platform-browser-dynamic": "~10.1.1",
    "@angular/router": "~10.1.1",
    "classlist.js": "^1.1.20150312",
    "core-js": "^3.6.5",
    "rxjs": "~6.6.3",
    "tslib": "^2.0.1",
    "web-animations-js": "^2.3.2",
    "zone.js": "~0.11.1"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.1001.0",
    "@angular/cli": "~10.1.0",
    "@angular/compiler-cli": "~10.1.1",
    "@types/node": "^14.10.0",
    "@types/jasmine": "~3.5.14",
    "@types/jasminewd2": "~2.0.8",
    "codelyzer": "^6.0.0",
    "jasmine-core": "~3.6.0",
    "jasmine-spec-reporter": "~5.0.2",
    "karma": "~5.2.2",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage-istanbul-reporter": "~3.0.3",
    "karma-jasmine": "~4.0.1",
    "karma-jasmine-html-reporter": "^1.5.4",
    "protractor": "~7.0.0",
    "ts-node": "~9.0.0",
    "tslint": "~6.1.3",
    "typescript": "~4.0.2"
  }

tsconfig.base.json

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "es5",
    "module": "es2020",
    "lib": [
      "es2018",
      "dom"
    ]
  }
}

polyfills.ts

import 'core-js';
import 'classlist.js';
import 'web-animations-js';
import 'zone.js/dist/zone'; 

.browserslistrc

last 1 Chrome version
last 1 Firefox version
last 2 Edge major versions
last 2 Safari major version
last 2 iOS major versions
Firefox ESR
not IE 9-10 # Angular support for IE 9-10 has been deprecated and will be removed as of Angular v11. To opt-in, remove the 'not' prefix on this line.
IE 11 # Angular supports IE 11 only as an opt-in. To opt-in, remove the 'not' prefix on this line.