Yep. LLMs are at their core text completion engines. We found out that when performing this completion, large enough models account for context enough to perform some tasks.

For example, "The following example shows how to detect whether a point is within a triangle:", would likely be followed by code that does exactly that. The chatbot finetuning shifts this behavior to happen in a chat context, and makes this instruction following behavior more likely to trigger.

In the end, it is a core part of the text completion that it performs. While these properties are usually beneficial (after all, the translation is also text that should adhere to grammar rules) when you have text that is at odds with itself, or chatbot-finetuned model is used, the text completion deviates from a translation.