[BUG] mermaid code block is inconvenient

[JParedesd]

Plugin Name
Mermaid

Describe the bug
I cannot copy and paste code to the mermaid bock, it gets out of the block

To Reproduce
I tried editing online and then pasting but does not work, it is inconvenient if i want to move code from one place to another, also using ENTER to jump lines crates a rem outside the code block which feels counter intuitive after using the code block for ether codes, I can only jump lines using SHIFT + ENTER