8K VR videos stuttering on SMB after Horizon OS v2.6 update

hi,

I'm experiencing amassive performance issues with local network streaming since the recent Horizon OS v2.6 update (Build 5222268). Before this update, everything was running absolutely flawless. Now, playing high-bitrate 8K VR videos over a local 5GHz SMB share has become completely impossible. The videos stutter constantly and get stuck in endless buffering loops with 2 seconds of playback and 5 seconds of loading.

Zero changes were made to PC, router, SMB shares, or network setup. The SMB connection itself still works and the 5GHz signal shows as perfect on the headset, but the throughput is extremely slow and throttled now. The exact same massive stuttering happens in both HereSphere and Skybox Player, and checking manually states the system is fully up to date.