Oh wow, it's true. This is from April, it was 8 at that time:

One Kiwi woman in her 40s was allegedly detained at San Francisco Airport for 15 hours and forced to buy a return ticket to New Zealand after officials took issue with the visa she’d been issued by the State Department.

Planning to visit her partner in Florida, who works on a fixed-term contract, before holidaying in Europe, the woman was allegedly questioned for five hours over her visa, Arizona-based author Wendilynn Kay alleged in a post reshared on Facebook.

https://www.nzherald.co.nz/travel/travel-news/eight-kiwis-detained-at-us-border-since-november-mfat-reminds-travellers-of-entry-rules-amid-safetravel-review/BUP6FRREGJE33FEV4IJ334VSVQ/