google-deepmind / google-deepmind/gemma

[BUG]: "Wait - I've made a mistake in the logic."

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Description

Image

I'm using `google/gemma-4-26b-a4b-qat` in LMStudio and exposed the chat endpoint to Copilot chat within VS Code. It has been working fine so far but in the last turn of my current conversation, it is stuck in processing the prompt as shown in the screenshot above. The logs show the same message being streamed to the coding agent

is this a known bug with Gemma4 models? or is using Copilot on top of the model causing this issue?

```
2026-06-18 14:18:08 [INFO]
[google/gemma-4-26b-a4b-qat] Generated packet: {
"id": "chatcmpl-89qu6thp29esjj8o71vcyb",
"object": "chat.completion.chunk",
"created": 1781766017,
"model": "google/gemma-4-26b-a4b-qat",
"system_fingerprint": "google/gemma-4-26b-a4b-qat",
"choices": [
{
"index": 0,
"delta": {
"reasoning_content": " I"
},
"logprobs": null,
"finish_reason": null
}
]
}
2026-06-18 14:18:08 [INFO]
[google/gemma-4-26b-a4b-qat] Generated packet: {
"id": "chatcmpl-89qu6thp29esjj8o71vcyb",
"object": "chat.completion.chunk",
"created": 1781766017,
"model": "google/gemma-4-26b-a4b-qat",
"system_fingerprint": "google/gemma-4-26b-a4b-qat",
"choices": [
{
"index": 0,
"delta": {
"reasoning_content": " "
},
"logprobs": null,
"finish_reason": null
}
]
}
2026-06-18 14:18:08 [INFO]
[google/gemma-4-26b-a4b-qat] Generated packet: {
"id": "chatcmpl-89qu6thp29esjj8o71vcyb",
"object": "chat.completion.chunk",
"created": 1781766017,
"model": "google/gemma-4-26b-a4b-qat",
"system_fingerprint": "google/gemma-4-26b-a4b-qat",
"choices": [
{
"index": 0,
"delta": {
"reasoning_content": " "
},
"logprobs": null,
"finish_reason": null
}
]
}
2026-06-18 14:18:08 [INFO]
[google/gemma-4-26b-a4b-qat] Generated packet: {
"id": "chatcmpl-89qu6thp29esjj8o71vcyb",
"object": "chat.completion.chunk",
"created": 1781766017,
"model": "google/gemma-4-26b-a4b-qat",
"system_fingerprint": "google/gemma-4-26b-a4b-qat",
"choices": [
{
"index": 0,
"delta": {
"reasoning_content": "\n"
},
"logprobs": null,
"finish_reason": null
}
]
}
2026-06-18 14:18:09 [INFO]
[google/gemma-4-26b-a4b-qat] Generated packet: {
"id": "chatcmpl-89qu6thp29esjj8o71vcyb",
"object": "chat.completion.chunk",
"created": 1781766017,
"model": "google/gemma-4-26b-a4b-qat",
"system_fingerprint": "google/gemma-4-26b-a4b-qat",
"choices": [
{
"index": 0,
"delta": {
"reasoning_content": " "
},
"logprobs": null,
"finish_reason": null
}
]
}
2026-06-18 14:18:09 [INFO]
[google/gemma-4-26b-a4b-qat] Generated packet: {
"id": "chatcmpl-89qu6thp29esjj8o71vcyb",
"object": "chat.completion.chunk",
"created": 1781766017,
"model": "google/gemma-4-26b-a4b-qat",
"system_fingerprint": "google/gemma-4-26b-a4b-qat",
"choices": [
{
"index": 0,
"delta": {
"reasoning_content": "*"
},
"logprobs": null,
"finish_reason": null
}
]
}

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