Microsoft fixes NDI streaming issues from August updates
🔧 Microsoft has resolved severe lag and stuttering issues affecting NDI streaming on Windows 10 and Windows 11 that appeared after the August 2025 cumulative security updates. The root cause was tied to KB5063878 and KB5063709 and manifested as dropped NDI traffic and degraded performance specifically over RUDP connections, while UDP and Single-TCP streams were unaffected. On September 9, 2025, Microsoft released fixes (KB5065426 and KB5065429) and recommends applying those updates; NDI also published a temporary workaround to switch Receive Mode to Single TCP or UDP in the NDI Tools Access Manager for systems that cannot immediately update.
