External FX clipping Aurora 16 and TotalMix but not Cubase

My Aurora 16 and Totalmix mixer are clipping on both output and input when I attach my hardware reverb to an FX Channel, but it doesn’t show clipping in Cubase on the audio track I’m sending to the reverb or the FX track meter. My hardware reverb meter has an output meter and it doesn’t show it is peaking.

Can anybody point me in a direction to understand/solve the problem? I can’t hear any distortion, but something isn’t calibrated correctly.

Thanks in advance to anybody who has advice.