No idea - I'd say it's more about your angle of sitting. I ride with the Fizik Arione VSX and have a relative high saddle to bar drop because it's friendlier to leaning at lot more forward. Even then every once in a while I will sit back.

I'm just putting you issue as more likely down to the length of the ride than anything inherent with the saddle. Sit in any position long enough and the pressure/contact point will let you know via sending pain to your brain.

You're riding Antares so you're more in the middle range, I'd say try to find that middle balance, if it continues, lean forward more, if it doesn't get better sit up more. All trial and error.