berlysia

Hi, I also faced this problem and got some small reproducible patterns, and some memorization solve them. working sample: https://codesandbox.io/s/jest-dom-404-repro-mmb2s implementation is also folded here ```tsx import { useEffect, useReducer,...

:memo: My first reproducible code (in https://github.com/testing-library/jest-dom/issues/404#issuecomment-952179213 ) is now fixed with: - `@testing-library/jest-dom` 5.14.1 ～ 5.16.5 - `@testing-library/react` 13.0.0 ～ 13.4.0 (effective changes are between 12.1.5 and 13.0.0 ?)...

I did another research for [previous comment](https://github.com/testing-library/jest-dom/issues/404#issuecomment-1374535617). I've found that the detached element is easy to get and hard to notice. Here is my latest research. https://codesandbox.io/s/peaceful-thunder-h7tfmx This mini-app says...

Thank you for trying and clarifying. I did investigation again. In development environment: 1. Happened. (unexpected multiple render + does not cleanup) - To observe this, use `setInterval` timer and...

To summarize issues with nested island components: 1. When hydrating the outputted HTML, nested islands are evaluated multiple times without cleanup. The number of evaluation is same as the level...