Estimated range drastically over calculated

I just completed an 850 mile round trip. ABRP consistently overestimated my ending state of charge at each stop. I got to the point where I’d add 15% more battery than ABRP suggested; that worked. The first stop was down to 5% rather than the predicted 15%. That’s too close to empty. Granted I drove at 80 mph, but the software seemed to be calculating as if I were going the 70 mph speed limit. The app should base its calculations on real time info, not a projected guess. FYI: 2025 AUDI Q4 Etron 55 paid ABRP subscription.