When [lShift+F1] is pressed to trigger the main menu of a certain other mod, this mod captures the combo keypress and interprets it as if just [F1] was pressed, locking the player out of the other mod's menu and forcing this mod's main menu to open against wishes. That same other mod also uses [LShift] with [F2] and [F3], but those in fact work as expected, allowing the separate features of both mods to be activated.

I am weeks new to Ark. While I know there are other games whose fundamental keyboard handling is just that primitive, I've seen no evidence of that in this game. Then there's the confirmation from one combo key being intercepted but NOT two others. I conclude from this that it's a flaw in this mod's scripting.