August 1987, OMNI magazine "Space Sex Dream Solved" Jim describes a report from March 2-3, 1978, from 18-year-old Brazilian Jose Inacio Alvaro, who witnessed a ball-shaped UFO crossing the sky and later responded to telepathic messages to meet a female alien in a field for interplanetary intercourse. Hypnotic regression by UFO investigators confirmed the story. Jim suggests the UFO was a sunlit fuel dump from the booster rocket carrying the Molniya 1-39 into space, which was passing over Brazil at that time. But it's still a classic "true UFO" on the internet: here and here

August 1992, OMNI magazine -- Russian UFO Panics Moscow, Flies to South America Jim describes mass UFO sightings on June 14, 1980, in the USSR and then Argentina, only an hour apart, that he investigated and concluded were caused by a rocket launching from northern Russia that later passed over South America. Many pilots reported weird in-flight encounters.
Still reported as 'true UFOs' on the Internet: here and here

“Great East Coast UFO” of August 1986 – The Space Solution

Dan Aykroyd Describes 'Telepathic Encounter' with East Coast Pseudo-UFO

Sky and Telescope (1988) – Space Vehicles Misperceived as UFOs

How Professional Pilots Can Misinterpret Spaceflight Activity As UFOs

Alaska “Iditerod UFO” (March 1987) Caused by Kosmos-1833 Launch

How Flaming Falling Satellites Look Like ‘UFOs’

Biggest French “UFO Flap” in decades – sparked by falling satellite

Space.com (1999): Chinese UFOs caused by space activities

Astronomy magazine (2002) -- Space rocket fuel dumps spark ‘UFO sightings’

Spectacular Canary Islands UFOs (1970’s) – Actually US Missile Sub Launchings

Some “Flying Triangles” Sparked By Secret Triple-Satellite Orbital Fleet

September 20, 1977 -- Petrozavodsk "Jellyfish UFO" solved Chapter 9, "UFOs and Outer Space Mysteries", 1982 caused many UFO reports.