It sounds like you have run into the long-standing conflict between Equalizer APO and Microsoft’s Protected Audio Path, which Edge and the Netflix app rely on for 1080p playback, so unfortunately there is no reliable fix unless Microsoft changes how protected output is handled; most users end up choosing between keeping APO enabled for system-wide EQ or using a browser that supports Netflix’s higher-resolution DRM without modification, and if you prefer not to downgrade to 720p, your best workaround...
It sounds like you have run into the long-standing conflict between Equalizer APO and Microsoft’s Protected Audio Path, which Edge and the Netflix app rely on for 1080p playback, so unfortunately there is no reliable fix unless Microsoft changes how protected output is handled; most users end up choosing between keeping APO enabled for system-wide EQ or using a browser that supports Netflix’s higher-resolution DRM without modification, and if you prefer not to downgrade to 720p, your best workaround...