FYI you skip any transforms in QGIS with spatialRefId=4326
in the URL.
https://hub.arcgis.com/api/v3/datasets/b0aaa5d6f376467884cab24f7139a2bf_51/downloads/data?format=csv&spatialRefId=4326
It also might be worth noting that JOSM isn’t great with geojson when coords overlap, csv may be easier.