Updated two 750Xi units at KAPA this afternoon and the new 23.12 load, paired with G500 TXi 3.11 and GTX 345, eliminated the 1–2 second GP annunciation delay and the occasional ADS-B “fail” flag during engine start. If you were troubleshooting ARINC 429 rate weirdness or ghost targets, this seems to settle it — curious what you see in actual flights post-update.