First post I've ever made, but I can't seem to find anyone with this problem.
I've ran all 19 paths in the Corridors of Time and only have 18 lore entries. I've also ran the.emblem path and have the emblem. I noticed it messed up around pathway 12/13 and yes I have ran them all a second time.
What I believe happened was before the lore popped up on my screen I walked/hopped towards the tomb and was teleported to the beginning. The lore never popped up and now it seems it never will.
With a triumph score of 107,360... you can tell I've been meticulous about these "trivial" things, but I cannot for the life of me figure out why it won't pop up.
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I had this issue as well. I was missing two. Did you die during one of them? That might have caused one not to drop. I noticed that if you got teleported back to the tomb chamber when trying to leave the next one did not give lore. I had to leave and come back to get it to start working again. Are you using different sources for the codes? Maybe someone's codes are numbered differently. Are you running it with other people. This is the one that screwed my lore drops up. Once we split up we both had no problems with 12-emblem Sadly I ran through the first 10 at least 4 times each to try to find which path didn't give me lore. I knew I was missing path 12. I don't know if mine was just messed up or was missing something but I got frustrated and got off for the night. Next morning 12 popped as soon as I ran it and found the one I was missing in first ten (naturally 9 so I had to run them all again to find it 🤣) I wish I had a difinitive answer for you. Hopefully some of these issues can help you narrow down what might have happened to you.