json::parse(std::string) Exception inside packaged Lib

[brigb123]

I'm using the 1 header source in a packaged static library of my own, which is linked to a large application. I tested the same json string in a small test application with no issue. The exception in the large application while debugging:

The members in the screenshot context look suspicious.
I'm unable to catch the exception, being an access violation.

This is the json:

{
"type": "command",
"message_id": "add_player",
"id": "d78bd9ad-9dd2-4186-9d96-7fce52c8e68c",
"timestamp": "2018-10-17T15:24:34.7584775-07:00",
"requestor_id": null,
"payload": [{
"profile_id": "5c57c8d9-76aa-4239-9cec-621be0fa89a6",
"player_name": "Player 1",
"handicap": 1,
"handedness": "right",
"avatar_id": "5c57c8d9-76aa-4239-9cec-621be0fa89a6",
"avatar_data": null,
"fsxlive_authorization_guid": ""
}]
}
I'm unsure if there are some nuances that have been seen before to cause this. It's very frustrating to debug when I have no error feedback. Again, the json::parse() steps through fine with the following main:

int main(int, char**)
{
std::string s;
s += "{\r\n";
s += "\t"type": "command",\r\n";
s += "\t"message_id": "add_player",\r\n";
s += "\t"id": "d78bd9ad-9dd2-4186-9d96-7fce52c8e68c",\r\n";
s += "\t"timestamp": "2018-10-17T15:24:34.7584775-07:00",\r\n";
s += "\t"requestor_id": null,\n";
s += "\t"payload": [ {\n";
s += "\t\t"profile_id":"5c57c8d9-76aa-4239-9cec-621be0fa89a6",\r\n";
s += "\t\t"player_name":"Player 1",\r\n";
s += "\t\t"handicap": 1,\r\n";
s += "\t\t"handedness":"right",\r\n";
s += "\t\t"avatar_id":"5c57c8d9-76aa-4239-9cec-621be0fa89a6",\r\n";
s += "\t\t"avatar_data": null,\r\n";
s += "\t\t"fsxlive_authorization_guid":""\r\n";
s += "\t} ] \r\n";
s += "}";
auto j = json::parse(s);
FSS::CciMessage c = j;
return 0;
}

[brigb123]

Different versions of the header were linked and causing library clashes.