...saying you were tired is not the kind of thing you should mention when you describe a strange happening.

[Just saying. His concern Pyrrha and Yurika may have not really seen anything increased a bit]

Regardless of that, if it was part of our missing memories, then that's a good sign. Speaking from experience I can tell you it'd usually take a lot of trauma to the head to undo missing memories.

This could mean whatever procedure the masterminds here used was a rather mediocre one. Who knows...we may see more glimpses of our missing memories.