Microsoft resolved severe lag and stuttering issues in NDI streaming software affecting Windows 10 and 11 after August 2025 security updates. Users experienced performance problems with apps like OBS and NDI Tools. Microsoft released updates (KB5065426 and KB5065429) to fix the issue, caused by KB5063878 and KB5063709 updates, which disrupted RUDP connections. A temporary workaround using TCP or UDP was also provided.