Lexical version: 0.42.0

Steps To Reproduce

1. Create an ImageNode and add a link and/or bold text to the caption
2. Move the cursor to formatted text or a link

Link to code example:

https://playground.lexical.dev/#doc=H4sIAAAAAAAAE-1UTWvcMBD9K2LOiu0NMcvqWig99BDYkFBKD6o1a08rS0Ya27ss-9-L7GyT7CFJk1Da0pM1I-Z9yHraAxpiH9asGUHtIXjP6Vs1ZE1AB-rzScG7DkEBtbpGkDBgiOQdqIUEbfkKtwwKPqG1fhQb60cMgpxgsixiQxsWFl0ECZXueBrc_7oGg6zJgiokbHxoNU_L1pukzKWOBQmRdzY1QALPsq4pEgtuUKTebGTauu_jIJ9mWzyH7SNuqZr2HqN6qRcx4tdIjI_Bf5FgKGA1H7Trrb0jSVDkDLqZ8BbDkvt-8lcD2uMs61Aj_6yIk6a56IMFBQ1zF1We29l6ZnDI4VUuNz4I46u3ddnpoOugu-bEasJ-fycvleujpBfQTBf5gdTDQUKDVDe3_vX2hgw3oMqikBAbP747xoJDjxJiqEBBrmNEjvluitXZHKuzQQ-rD3HA7FtXg4RxRip-13k8Iyb_Q_lPh7Jv0bFOPoR2RrQ-oCA3Q5F32R8Q2ofX5m96KSRYHXmtBzSgFstlWS7L84vVqkwPhe9DleYurd7VwffO3J-GIrs4zwo4_ABRJIvd3wcAAA

The current behavior

The toolbar does not show active buttons if the cursor is located inside a nested lexical instance (caption editor). Also in the debug view you can see that the main instance did not receive the SELECTION_CHANGE command. Therefore, the toolbar plugin does not update its state https://github.com/facebook/lexical/blob/v0.42.0/packages/lexical-playground/src/plugins/ToolbarPlugin/index.tsx#L784-L787

The expected behavior

The toolbar displays the current state of the buttons for the text in the image caption

Impact of fix

It seems this behavior was influenced by this PR #8202

The description says:

Unhandled dispatched commands are now only bubbled to parent editors if the parent editor is not currently in an update

I couldn't find the specific code responsible for delegating events to the parent editor, but I'll note that I caught this bug in an editor that doesn't use extensions