iOS only showing lo0 adapter when using LTE

I have an iOS device that's showing some weird output.

On a working device, when I'm connected to wifi, I'm seeing these two adapters active

lo0  - I'm assuming this is the loopback adapter
en0  - The wifi adapter

On the same working device, when I'm connected over LTE, I'm seeing these two adapters active

lo0     - The loopback adapter
pdp_ip0 - The LTE adapter

However, on this strange device When I'm connected over LTE I'm only seeing

lo0 - The loopback adapter

However, I'm still able to make connections, brows the web, etc while on LTE and the LTE icon is still displayed at the top of the device.

I'm trying to understand why this is happening with this device. It's causing issues with the transition of a VPN process as it technically thinks there is no reachability over LTE when it transitions from WiFi to LTE. It's also causing issues with server lookup as my NSURLSession and NSURLRequest are timing out on API calls.

This transition works perfectly on most other devices. It's only on this device that it is acting this way.

Any help?