A weird case where TreeView shows selection but editorState does not have selection

[addlistener]

The problem

My TOGGLE_LINK_COMMAND is broken and making activeEditorState._selection to equal null when trying to render a Lexical in a separate root created in an iframe.

The crime scene

As shown below, I run into an breakpoint. LexicalLinkPlugin uses $getSelection

lexical/packages/lexical-link/src/index.ts

Line 417 in 21d5447

const selection = $getSelection();

And it returns null selection, I stepped in and found editorState does not have _selection.

LexicalTreeView is also using $getSelection

lexical/packages/lexical-react/src/LexicalTreeView.tsx

Line 401 in 21d5447

const selection = $getSelection();

but it works fine.

Background

I'm rendering lexical in an iframe, created a separate react root compared to parent window's root.

My research

I have read about #2108 and it seems that the portal into iframe problem should already be solved by https://github.com/facebook/lexical/pull/2918/files

In my case there are no portals. Just a separate react root.

Still thinking...