Geth in the Tunnels on Feros Bug has existed since 2008
If you are on Feros and on the "Geth in the Tunnels" mission where you must destroy the Geth Transmitter and you find that you cannot get the mission to progress then you most likely are using a Damage-over-Time Ammunition (Pyro, Chemical, etc) and just need to remove that. Hopefully you have a recent save game.
If the transmitter is destroyed by one of those 'effects' rather than by ammunition or explosion, it won't count and you cannot progress through the mission which means you cannot progress through the game.
For being one of the most reproducible and common game-breaking bugs, you think they would have caught this one on the remaster. You suck BioWare. 20 hours into the game to learn I'm screwed. First time in my life a game bug has made it 100% impossible to progress. First Anthem, now this. I will never buy another BioWare game as long as I live.