There are some odd bugs in the state-based checks since the Reality Fracture update on my Windows 11 laptop. Playing game in ranked draft with Massacre Girl Most Wanted in play seems to trigger the bugs. I gave opponent 6/4 creature -3/-1 down to a 3/3, blocked with my 4/4, then my creature and his both died, triggering my Massacre Girl. I checked every card on the field, no effects that should cause this, my creature should have lived. Then, my Eye of Jace sacrificed at my upkeep and it triggered my Massacre Girl even though she should only trigger from creatures or planeswalkers. Lastly, even after they killed my Massacre Girl and attacked with everything, I buffed my Gecko to 9/9 but after damage resolved and I was looking at the You Lost screen, I noticed the Gecko died even though I blocked an 8/8, so the engine seems to be failing to register buffs and debuffs when it checks marked damage at the next state-based check.