In Coliseum, when a player enters undermanned a default character(s) is added to make a squad whole.
Tier 6, Death Trooper is added for an ISB led squad.
Death Trooper shares the keyboard shortcut "G" with the 5th position slot, so if you load a leader and a character int he 5th position (or remove characters from 2-4 as I did), two characters have the G shortcut.
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I had an image but Microsoft has gone whole hog on AI for their OS development and it's become an unusable pit of **bleep**. Screenshots are loaded in the clipboard but switching contexts removes the clipboard contents.
Screenshot showed a coliseum battle with keyboard shortcuts over the characters and "G" was used twice.