What problem are you facing?

The Node.js TLS ca option can be a string, buffer, or array of string/buffer. When passing an array, the Node.js driver only picks the first value due to this line:

https://github.com/mongodb/node-mongodb-native/blob/b0d44137e12dbed69fbc96c963dbf1da7fddbc6b/src/connection_string.ts#L561

What driver and relevant dependency versions are you using?

Node.js driver 4.4.0.

Steps to reproduce?

Create a MongoDB TLS server (or any, really), with a custom key/cert and then try to connect with the MongoDB driver’s ca option set to an array in which the corresponding CA certificate is not in first position.