The 26-year-old was the best of the Swedes together with Anna Nordqvist, both in pairs, and is currently in a shared 23rd place.
Up to leading home player Danielle Kang, there are six strokes.
Sweden's Nordqvist mixed and gave with three birdies and as many bogeys, while Johansson, ranked 443rd in the world and "only" 15th highest in Sweden, was disturbed by a double bogey on the tenth hole.
Several players are still out on the field.
Sweden's Madelene Sagström went heavier and is currently in a shared 38th place, one over par.
The LPGA Tour did not have time to play more than four competitions in January and February before the corona pandemic stopped.
CLIP: Sagström: "It will be great fun" (July 29, 2020)
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Sagström: "It will be great fun" Photo: Bildbyrån