Good question. When this article was written, in early April, there wasn't much "long" in the longhaul. Other writers have since documented the phenomenon, though we're still learning about it given, well, "long." Here are some excellent pieces:

Dana G Smith writes about post-civid “crippling fatigue, feeling groggy or fuzzy-headed, joint pain and deep bone aches, chest pain, heart palpitations, headaches, dizziness, and insomnia” here: https://elemental.medium.com/the-long-term-health-impacts-of-being-infected-with-the-coronavirus-d3a03f3cb6e8

Jessica Firger tells her own story here: https://elemental.medium.com/what-covid-19-did-to-my-brain-2c8ee0b64c6e

And Ed Long provides an overview here: https://www.theatlantic.com/health/archive/2020/06/covid-19-coronavirus-longterm-symptoms-months/612679/