All LLMs can fail this way.

It's kind of weird to see people running into this kind of issue with modern large models with all the RL and getting confused. No one starting today seems to have good intuition for them. One person I knew insisted LLMs could do structural analysis for months until he saw some completely absurd output from one. This used to be super common with small GPTs from around 2022 and so everyone just intuitively knew to watch out for it.