When I try to open the GUI for the timer combinator, one screen flashes open then quickly closes (I think the reset condition screen), and is replaced with the reset count and update interval screen. No output comes from the combinator...?

Nevermind: to anyone with this problem, you need to go into your keybinds and change the bind for opening the GUI because it's the same as opening the other menu. I still think this is a problem because it shouldn't be double bound right off the bat.

Nope: Confirmed, this is not working, despite getting into the menu, the timer combinator does not count up.

Will look into and fix

You need to input Start Signal to start the timer combinator, new update with tooltips has that info now