I just update to the new version and found the sluggish issue that never happened in earlier version. Kdenlive: 25.08.1 Package Type: Unknown/Default MLT: 7.33.0 Qt: 6.9.1 (built against 6.9.1 x86_64-little_endian-llp64) Frameworks: 6.18.0 System: Windows 11 Version 24H2 Kernel: winnt 10.0.26100 CPU: x86_64 Windowing System: windows GPU: Movit (GPU): disabled Track Compositing: qtblend