Autoclosing pair issue in VS code when dealing with multiple characters

[qutreson]

VSCode Version: 1.18.1
OS Version: Win10

Steps to Reproduce:

1. Write { "open": "begin", "close": "end", "notIn": ["string", "comment"] } as an auto closing pair
2. Write a comment with "begin"

Expected: It does not close the pair by automatically writing "end".
Actual: It does close the comment by writing "end".

Reproduces without extensions: Yes

I tried the following auto closing pairs:

"autoClosingPairs": [
     // Those are not closing in comments
     { "open": "'", "close": "'", "notIn": ["string", "comment"] },
     { "open": "b", "close": "d", "notIn": ["string", "comment"] },
     { "open": "u", "close": "nn", "notIn": ["string", "comment"] },

     // Those are closing in comments even with "notIn"
     { "open": "nn", "close": "u", "notIn": ["string", "comment"] },
     { "open": "op", "close": "qo", "notIn": ["string", "comment"] },
     { "open": "begin", "close": "end", "notIn": ["string", "comment"] }
],

I think the problem here is that VS code does not handle properly pairs where the opening part has multiple characters.