Padshop 2 Tuning

I’m using Padshop 2 in Cubase 12 Artist on Windows 10 and using patches such as PWM Vintage Stereo, and Sweet Saws. But they are ever so slightly out of tune compared with patches in Halion Sonic SE3, and also my hardware synths which I trust impeccably.

In Padshop 2 I need to set the Main Tuning to 435.5 for it to be in tune, i.e. I need to flatten it by around 18 cents

Is this intended behavior or is it a bug ? and if so is it in Padshop or the patches ?