Here's one tell-tale of many: "No alarm, no program light."
Another one: "Two instructions are missing: [...] Four bytes."
One more: "The defensive coding hid the problem, but it didn’t eliminate it."
This is just writing; terse maybe and maybe not grammatically correct, but people write like that.
"Here’s how the bug might have manifested."
That's just writing. I frequently write like that.
This insistence that certain stylistics patterns are "tell-tale" signs that an article was written by AI makes no sense, particularly when you consider that whatever stylistic ticks an LLM may possess are a result of it being trained on human writing.