Gemini CLI is dangerous to use, code lines deleting not fixed by now (27 Nov 2025)

[dezmen3]

What happened?

Task example:

• Read 1000 lines source file
• Translate all text messages to English

Task result:

• All messages translated (sometimes may skip few on different tests)
• About 4 lines of code removed in random places resulting complication errors.

What did you expect to happen?

Translated messages without removing the actual code.

Client information

Client Information

Run gemini to enter the interactive CLI, then run the /about command.

> /about
│ CLI Version                              0.18.4                                                                       │
│ Git Commit                               2e8d7831c                                                                    │
│ Model                                    auto                                                                          │
│ Sandbox                                  no sandbox                                                                   │
│ OS                                       win32                                                                        │
│ Auth Method                              OAuth 

Login information

Google OAuth

Anything else we need to know?

My guess - Model Router option ruins whole Gemini CLI reliability and operability by switching to 2.5-flash or 2.5-flash-lite while doing task, especially when you have gemini 3.0 enabled. Disabling Model Router removes ability to choose model and sets it to gemini-2.5-pro without having ability to use gemini-3.0-preview