Bug: Text style not updated when inserting a new block of styled text

### When I copy a block of styled text and insert it into a new position and continue typing, new typed characters doesn't have the new style of the text block I copied but the old style from the text before
(It's quite hard to explain because of my poor English, you can watch the drive's video for more detail)
Is it a bug or a feature? Please suggest me how to fix this, thanks

Lexical version: 0.12.0 (Tested on Playground as well)

## Steps To Reproduce

1. Copy a block of styled text and insert it into another position that currently has different style
2. Start typing new text

Link to evidence: https://drive.google.com/file/d/1Rv2OJCs7X_3tDH6klC0EZVHdtaTSMKTD/view?usp=sharing

## The current behavior
The new typed text still has the old style, not the new style of the new inserted text block

## The expected behavior
The new typed text has the style of the new inserted text block