Opus Encoder throws error only in packaged build

So we are trying to capture audio and compress it using opus.

This is how we create the encoder:

Encoder = FVoiceModule::Get().CreateVoiceEncoder(48000, 1, EAudioEncodeHint::VoiceEncode_Voice);

This is how we capture:

VoiceCapture->GetVoiceData(CaptureBuffer.GetData(), bytesAvailable, readBytes, sampleCount);

This is how we call to encode:

Encoder->Encode(CaptureBuffer.GetData(), readBytes, EncodeBuffer.GetData(), encodeBytes);

We know we do capture data, since we log readBytes.
It also works perfectly fine in the editor or in editor “standalone”. However, it doesnt really seem to work in a packaged build. Though, the odd thing is, SOMETIMES randomly it works.

The log just says:

[2021.03.04-10.47.24:893][362]LogTemp: Warning: (VoiceChat) Volume: 5.731047 Buffer: 8 kb
[2021.03.04-10.47.24:893][362]LogVoiceEncode: Warning: Failed to encode: [-1] invalid argument