bug: app does not reload the model when the prompt template is updated

[louis-menlo]

Jan version

v0.5.14-962

Describe the Bug

During the testing phase of Deepseek R1 models, we find ourselves manually updating the model's prompt template repeatedly. When switching to a different model and then switching back, an issue arose. The model template was reset, but not applied. The model wasn't reloaded because the app perceived it as the same loaded model (with the same ID).

Steps to Reproduce

1. Select Model A (DeepSeek R1 Qwen 1.5B), modify the chat template (<｜begin▁of▁sentence｜>{system_message}<｜User｜>{prompt}<｜Assistant｜><｜end▁of▁sentence｜><｜Assistant｜>).
2. Send a message to trigger model load
3. Select Model B (DeepSeek R1 LLama 8B), don't send any message.
4. Switch back to Model A.
5. See model still using the template applied above.

https://discord.com/channels/1107178041848909847/1324226875123564635/1331414647445913733

Screenshots / Logs

What is your OS?

• MacOS
• Windows
• Linux

[imtuyethan]

Fixed with Jan v0.5.15-rc5-beta