Bold Text issue

Hey everyone,
When write some thing and the bold it by clicking on Bold option from toolbar, they will bold the text which is correct behavior but when i select the text again and again click on bold option from toolbar instead of removing bold they add more **.

for example:
i enter as text MARKDOWN

and then click on Bold button now the editor show output like this :
MARKDOWN

Now i want to remove bold property i click again on bold option then instead of removing they show me this output:

MARKDOWN

which is i think so not a correct behavior.
Because its a common behavior in all editors when we click on bold , they bold the text but if we click again on bold option by selecting same text they remove the bold.

https://www.loom.com/share/61953a4b2c6a438191235d896df61b8b

i also attached video link

Reproduce the issue in the editor by selecting already-bold text and clicking the Bold toolbar control twice. Trace the toolbar action and its Markdown selection handling; done means toggling Bold removes the existing ** markers instead of adding another pair, while the initial bold action still works.