Inline icons don't appear in the editor

[admturner]

Describe the Issue

The inline icon insertion method using render_block is not working in the editor because the output is overwritten after render_block runs. Probably by the save function.

Steps to Reproduce

1. Visit the editor
2. Create a block that would have an icon (like a heading block with a link)
3. See error

Screenshots, Screen recording, Code snippet

No response

Environment Information

• WordPress 6.5-beta2

Version

Development version (develop)