[cocos2d-x C++] iOS HTTP Client crashing randomly at ~1% of all requests

[ForestRingGames]

cocos2d-x version: 3.16
devices test on: iPad Air, iPad Pro, iPhone 6S
developing environments
NDK version: 16
Xcode version: 9.2
VS version: -
browser type and version: -

Crash type: com.apple.NSURLConnectionLoader EXC_BAD_ACCESS

Our game is doing some HTTP Requests with our backend at game startup and unfortunately, this does crash sometimes. It's not directly crashing on the HTTP Client's code but on a background thread (see crash screenshot).
Researching this, I've found that many people have been experiencing this crash in the past, usually the reason was an outdated Network Library on iOS (like old AFNetworking version, etc.).
(see https://github.com/AFNetworking/AFNetworking/issues/357 or Alamofire/Alamofire#1886)

Is Cocos2d-x using a specific network library that one could update?
Is there anything, we can do against this?