I found a weird, if harmless bug, and no idea where to report it. In the morning while in town, Katarina suddenly started acting like it was during a battle, moving around all hyper speed and relentlessly following me. No idea what caused it, but it triggered after seeing her dialog on first noticing Qiyana's slave collar.
And maybe related, I lost the entire day and skipped the battle when I tried speaking to her again due to her "beating you unconscious" event. The previous day I had the scene where you pick between her or Irelia, was spamming A and ended up going with Irelia, and when I went to see Kat that same night, she just told me to let her drink alone in peace. Then the next day, the weird bug happened, and after trying to speak with her once she went all aggro in-town she beat me unconscious and I woke up at night, entirely skipping the battle that day.
Edit: On a related note, day 1, everyone was everywhere at the same time. Like, there were extra copies of all 3 girls doing everything they could be doing when I explored the town before the first battle. Kat was both training at the dummy, and wandering, Lux was in the training ground as well and also wandering around. Going into the Inn, everyone was at the table, as well as upstairs.
Edit2: Lux also magically regains her boots when she runs out of mana. She ran out, I saw her kick me, reloaded the save and tried again, this time making sure to remove her boots with the special de-armor skill, and when she ran out of mana this time, nothing changed and she magically had her metal boots again. Pretty cheap that even preparing for what I knew was coming can't change a thing about it.
Edit3: What exactly is the dark seal? It's in my inventory after letting Morgana chain me, it appears under my weapon item list, yet doesn't actually appear as an equitable item, and also doesn't trigger passively. I don't know what the item is even doing there, as I can't interact with it in any way despite it being in my inventory.