[6.16.2, Ghostrider] 0.1% of rejected shares
XMRig 6.16.2 GCC, Raptoreum / Ghostrider, Flockpool.com

About 100 different machines (ranging from low-end Pentiums and i3s 6-7 gen to high-end i7s, i9s and Ryzens and a few Xeon and EPYC servers), mostly on Windows. Consistent 0.1% of 'high-hash' rejected shares (120 out of 95k) regardless of hardware or software config. There were no rejected shares when i was using cpuminer-gr. Minuscule amount so it's not really an issue, just reporting in.