Confabulation/Hallucination - https://github.com/lechmazur/confabulations
Failure to read context - https://georggrab.net/content/opus46retrieval.html
Deleting tests to make them pass - https://www.linkedin.com/posts/jasongorman_and-after-it-did-...
Going rogue and deleting data - https://x.com/jasonlk/status/1946069562723897802
Agent security nightmares because they are not in fact intelligent assistants - https://x.com/theonejvo/status/2015401219746128322
Failure to read or generate structured data - https://support.google.com/gemini/thread/390981629/llm-ignor...
There are many, many examples, mostly caused by people thinking LLMs are intelligent and reasoning and giving them too much power (e.g. treating them as agents, not text generators). I'm sure they're all fixed in whatever new version came out this week though.