TR_m4_MG_Ando_8a 5 says Ethalvora asked the player to return the lens, but it was Adric.

Nelos keeps saying "Research has begun in earnest, thanks to you." even after the Polyhedrascope is finished.

If you buy the Bizarre Helmet from Malmas Habattu, the journal and dialogue still mention it as being part of the package he gives you despite this not being the case.

Killing Adric after escorting him out of Kurhu upsets Ethalvora because you "failed" the quest. She'll say he's here now, except he obviously isn't.

TR_m4_Ando_MG_CasterSc is missing a MenuMode check. It also waits for a random amount of time before maybe creating an explosion, but it recalculates that time every frame, practically guaranteeing it'll happen after the minimal possible delay.