What does "truncated file" mean in Figma Make?

I occasionally (once is too often) see the AI self-talk mention being unable to see what’s going on due to a “truncated file”. What does that mean. Eavesdropping on its “tinking” I get the impression there are times it can’t access all the code and hast to make blind changes. Is that what’s going in? (It can’t be, right?)