Marble testing of interval with shareReplay pipe crashes the test

Describe the bug

I made a copy of the test from Rxjs marble-testing examples (one with interval) and added shareReplay pipe to interval. It broke test, which never completes and sometimes even crashes my browser.

Expected behavior

Test would complete as expected.
Or at least it must tell me if test is failed and why.

Reproduction code

import {interval, map, shareReplay} from 'rxjs';
import {TestScheduler} from 'rxjs/testing';

describe('interval', () => {
  let testScheduler: TestScheduler;

  beforeEach(() => {
    testScheduler = new TestScheduler((actual, expected) => {
      expect(actual).toEqual(expected);
    });
  });

  // This one works as expected
  it('should repeat forever without shareReplay', () => {
    testScheduler.run(({ expectObservable }) => {
      const foreverStream$ = interval(1).pipe(map(() => 'a'));

      const unsub = '------!';

      expectObservable(foreverStream$, unsub).toBe('-aaaaa');
    });
  });

  // This one would crash
  it('should repeat forever with shareReplay', () => {
    testScheduler.run(({ expectObservable }) => {
      const foreverStream$ = interval(1).pipe(map(() => 'a'), shareReplay(1));

      const unsub = '------!';

      expectObservable(foreverStream$, unsub).toBe('-aaaaa');
    });
  });
});

Reproduction URL

https://github.com/iofedurin/rxjs-sharereplay-bug-reproduction

Version

7.5.6

Environment

No response

Additional context

No response

Start with the provided reproduction and the TestScheduler.run examples in the issue, comparing the interval cases with and without shareReplay. Investigate why the shareReplay case does not complete or report a failure when the '------!' unsubscribe is used. Done means the test completes reliably and exposes a useful failure when expectations are wrong.