the dialog is hard to understand, especially during the key inverter room scene - the dialog is backwards. The dialog is backwards (cause the speaker is inverted) and being reversed by machine, so you hear both the forward and backward dialog at the same time. Additionally due to inversion, the conversation is out of order and makes it harder to understand. The wearing of masks doesn't help the issue either.

Everything was much clearer the 2nd time around and improved the viewing experience immensely.