Inconsistent handling of empty 200 OK responses between simulator and device (SDK 8.1.1, Epix 2 Pro)

I am using Communication.makeWebRequest to poll a REST API. The server appears to have an issue and intermittently returns an empty response instead of a JSON payload.

The response has HTTP/1.1 200 OK but includes Content-Length: 0.

In the simulator, this results in a responseCode of -400 (INVALID_HTTP_BODY_IN_NETWORK_RESPONSE).

However, on the actual watch, the responseCode is 200 and data is null.

I am using SDK 8.1.1 and testing on an Epix 2 Pro 47mm, both in the simulator and on the physical device.

The code for the app is available here: https://github.com/TheNinth7/ohg. Reproducing the issue requires access to a server that is protected by basic authentication. I'm happy to share the necessary credentials or details via direct message or another secure method to help reproduce the issue.