Chartboost SDK integration issues driving me crazy!

I'm at my wit's end with Chartboost, seriously. Following up on the 'Chartboost interstitial acting weird' topic, I'm now facing what feels like insurmountable SDK integration issues that are completely blocking my app's launch on both iOS and Android. This has been going on for days, and I'm losing my mind trying to figure out what's going wrong. My whole monetization strategy is hinging on these interstitial ads, and right now, it's a complete standstill. This isn't just a minor glitch; it's preventing me from pushing live, and the pressure is mounting.

The problem manifests in several infuriating ways, making debugging incredibly difficult:

• Sometimes, the ads simply don't load at all, even after calling Chartboost.cacheInterstitial(). The didFailToLoadInterstitial delegate method isn't always triggered, leaving me in the dark.
• Other times, an ad reports as successfully loaded, but when I call Chartboost.showInterstitial(), nothing happens. No ad displays, no error, just silence.
• On rare occasions, when an ad does manage to display, it sometimes crashes the app immediately after closing, especially on older Android devices.
• The inconsistency is the worst part. It'll work perfectly fine on one test device, then completely fail on another with the exact same OS version. It also seems to break after specific user actions, like quickly navigating through several screens, though I'm trying to ensure I only request/show ads at appropriate times.

I've tried every single troubleshooting step I can think of, and nothing has stuck:

• I've triple-checked my App ID and App Signature in the Chartboost dashboard and my code. They are definitely correct.
• I've updated the Chartboost SDK to the absolute latest version available for both platforms. No change.
• I've re-initialized the SDK at different lifecycle stages within my app, from onCreate in Android to applicationDidFinishLaunchingWithOptions in iOS, and even later when the first ad is needed.
• I've verified network connectivity on all test devices and confirmed no weird device settings are blocking ads.
• I've combed through Logcat (Android) and the Xcode console (iOS) for any Chartboost-specific errors. While I sometimes see generic network errors, nothing conclusive points to an SDK misconfiguration.
• I've tested on multiple devices across various Android and iOS versions.
• I've reviewed the official Chartboost documentation and scoured community forums for similar issues, but haven't found a definitive solution that applies to my specific problem.
• I've even tried different ad placements and locations within my app, thinking it might be a context issue.

This whole situation is severely impacting my project timeline, delaying the launch, and frankly, costing potential revenue. I'm completely stuck and desperately need some fresh eyes or a miracle solution. Has anyone encountered such bizarre and inconsistent Chartboost sdk implementation behavior? Are there any less common pitfalls for Chartboost SDK integration I might be missing? Or perhaps some advanced debugging techniques beyond just logcat/console that could help me pinpoint the exact failure point?