+- returned operator functions from multicast operators `share`, `publish`, `publishReplay` are now referentially transparent. Meaning if you take the result of calling `publishReplay(3)` and pass it to more than one observable's `pipe` method, it will behave the same in each case, rather than having a cumulative effect, which was a regression introduced sometime in version 6. If you required this broken behavior, there is a workaround posted [here](https://github.com/ReactiveX/rxjs/pull/6410#issuecomment-846087374) ([#6410](https://github.com/reactivex/rxjs/issues/6410)) ([e2f2e51](https://github.com/reactivex/rxjs/commit/e2f2e516514bdeb76229e69c639f10f21bccafad)), closes [/github.com/ReactiveX/rxjs/pull/6410#issuecomment-846087374](https://github.com//github.com/ReactiveX/rxjs/pull/6410/issues/issuecomment-846087374) [#5411](https://github.com/reactivex/rxjs/issues/5411)
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