I'm using CodeSandbox to edit the following md doc:
This is an alert for _**{{ type }}**_
This is an alert for **{{ type }}**
This is an alert for _**{{ type }}**_
This is an alert for **{{ type }}**
it converts * to *:

but it's normal on remark.js

I don't know which other characters in remark-mdc will be converted to ASCII code, so I can't use replaceAll to do a batch replacement.