Misc. bug: missing messages in JSON export via llama-server web UI

[bughunter2]

Name and Version

$ ./llama-cli --version
version: 5359 (de4c07f)
built with cc (Debian 12.2.0-14) 12.2.0 for x86_64-linux-gnu

Operating systems

Linux

Which llama.cpp modules do you know to be affected?

llama-server

Command line

llama-server --threads 10 --model ./Ministral-8B.gguf

Problem description & steps to reproduce

When I use the web UI to download a conversation, a JSON file is downloaded, but I only seem to get the conversation's metadata, while the messages are not included.

{
  "id": "conv-1747263476494",
  "lastModified": 1747263485918,
  "currNode": 1747263476577,
  "name": "test"
}

First Bad Commit

Not sure. I remember this worked fine with a fresh build from a month ago or so.