I’ve tested it on 3 separate occasions now over the past year: last year in a bug report, last month and again today. It’s been across multiple game modes as well: Explore (auto-play mode), old PVP, practice matches, guild wars, new PVP. Recently I’ve only re-tested it in new PVP and practice matches. As far I can tell on my own testing, it hasn’t changed since release.
It’s possible it doesn’t always hold true but I haven’t come across those exceptions yet. It’s always just copied my last WoS choice.