I hear the same thing. Since I prefer the sound of no filter (aka NOS), I set the pre out to Variable -4dB, then set it to Fixed so it stays at -4. No more clipping into the amp.
Also, for those wondering how this V2 compares to V1 of the DAC, V2 is better at soundstage. RCA output is much better than before. Soundstage is noticeably larger. Imaging and Resolution are a little better. LDAC is supported. Same annoying spikes instead of rubber feet. It's a good update.