"iced tea" in context was a symptom - it might influence the downstream - but it is hard to establish that. The root problem was in weights - naming it 'context poisoning' is poisoning our reasoning context :)
It hallucinated that it needed tea.
Once that hallucination got into context, the context was poisoned.
If you don't want to believe that, then I cannot force you to, you can believe whatever you want.
But I (and the author) am explaining an otherwise well known problem with hallucinations getting into context.
It is also a bit tongue in cheek - if you did not notice - because of course all of this can be explained if needed even if the name alone suggests something else.
On the next round, it's likely to correctly determine lemonade.
Hallucinations are usually outliers. So 1 in 10 times it gets confused and picks tea. Those 1 in 10 times end up with poisoned context.
The models are not deterministic by design. Identical inputs produce different outputs. So if you roll a bad output, it can poison your context. Flushing the context can easily fix the problem (unless like the in the pokemon harness, you roll over a brief of the previous context)