Problem adding references

I’m having an odd problem with references that is only popping up in a single environment, and am hoping that someone else here has seen something similar/found a solution.

In this particular AX 4.0 SP2 environment, I want to reference an external DLL that I created in .NET. It has been registered in the GAC, and I can create the a reference to it through the AOT like would normally be done. Within a few minutes of having added the reference, though, it vanishes from the AOT, and I don’t have the faintest idea of what could be causing it.

The AX service is running with full admin privileges (both on the local box and on the network), and I’ve taken the entire code base to other environments/referenced the DLL without issue, so I’m kind of stymied. Has anyone else seen something like this before? Thanks!