Resolution automatically switches to 3840×2160 When playing HDR videos

The screen resolution is 3440×1440@100hz, hdmi_enable_4kp60=1. When playing HDR videos on Kodi(kodi-standalone) in raspberry pi 4, the screen resolution automatically switches to 3840×2160. But When hdmi_enable_4kp60 is not enabled, the resolution is right. Has anyone ever had this problem?