I'm not sure if I am the only one that I have no game replay at all. At least I don't see such an item in the known bug list.
But in Trinity it was always OK.
Do I need to submit any specific files to the devs?
You need to turn Auto Record on in the Options menu.
Ahhhh I am indeed heavily short-sighted... It's in the Record page. Thank you then! +1 Karma