Anyway, my take is that certainly this article is alarmist and click-baitish. Bloomberg's isn't quite as bad, being more detailed, nuanced, and getting official comment from Huawei. The headlines are certainly misleading about the nature and extent of the problem that they've exposed. Maybe it goes deeper, but Bloomberg utterly failed to provide any such evidence.
However, what this piece misses and Bloomberg's only touches upon, in the very last paragraph (and only in the form of a quote from one of their Chinese sources), is that this sort of thing happens in the US, all the time. There's nothing particularly remarkable about an employee of a US company collaborating with other researchers, who might be funded by a DoD or a DARPA grant. What I don't know is whether those employees are typically required to inform their employer of outside research (I assume so, even if it doesn't always happen).