Train signals/chain signals on elevated rails that have been hidden can still have their tooltip viewed, and can be placed/removed on hidden elevated rails when the "hide tall buildings" setting is on.

Elevated rail signals and ground signals can perfectly overlap, making it difficult (but not impossible) to figure out what kind of signal is on the ground level and which signals are on which level in general. I'd expect the "toggle tall entities" to toggle attached rail signals as well. Attached ...

I was unable to find a combination of settings in either Factorio or Logitech that didn't result in the lights turning off when alt-tabbing and then refocusing the game (even directly from the main menu immediately after launching the game). I could find no real difference between your settings and ...

I still encounter this issue on Factorio v. 1.1.69 with Logitech G-Hub v. 2022.8.306864 (released Aug 30, 2022) and a G512 keyboard. The lights are lit up in the Factorio color until I alt-tab, at which point they switch to the normal colors as expected when Factorio loses focus. Once Factorio is ...