Campaign Bug (Scout missing stealth ability)

Just started playing this, loving it so far. However, I failed a mission due to a death, had to restart from checkpoint (Act 1, chapter… 2 or 3 i believe.) Upon reloading, my newly acquired scout class character (It was the mission you get your first 2 new soldiers) no longer had the stealth ability, the basic class ability. They had it the first time, but now its gone. Permanently. Ive progressed further into the campaign, and its still gone. Tried leveling them up, but its still just gone. Doesn’t show on the toolbar. In the skill tree, you of course see it in the middle, but on the right side under “abilities” it doesnt even list it, even though she is supposed to have it…

Not sure what caused this just from reloading at the checkpoint, but it kinda makes my scout a whole lot less useful. I haven’t found another one yet to see if new ones are also bugged, but I dont think my first one is getting fixed. Anything I could try…?