https://forums.stardock.com/421356/desyncs
Desyncs - Stardock Forums
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https://www.gamingonlinux.com/2025/08/warhammer-40000-dawn-of-war-definitive-edition-fixes-desyncs-between-windows-and-linux-steamos/
Warhammer 40,000: Dawn of War - Definitive Edition fixes desyncs between Windows and Linux /...
Warhammer 40,000: Dawn of War - Definitive Edition released recently and it works great on Linux, even better now the online works properly too.