Closing bracket seems to disappear after pressing enter

[Nil-Cipher]

Hello, I'm new to all this, but the auto-completed closing bracket disappears if I press enter while the cursor is in between the brackets. Is this supposed to happen, and how do I prevent it?

[0xMH]

Note that the closing pair disappears after pressing . This is required to not break dot-repeat, but it will be automatically restored later.

Quoting from the README here.

you can prevent erasing the closing string by setting
g:pear_tree_repeatable_expand to 0.