So I was using the Zoltan ship, on advanced edition, and was on a really good run. I had both a Glaive Beam and Chain Vulcan, and was tearing into every ship along my way. Along with that, I was well on my way of unlocking the Mystery Ship, only needing to go the the Rock Homeworlds in order to unlock it. Suddenly, I hit a ship outfitted with heavy-duty missiles, teleporters, and lasers, which tear through my Zoltan shield like paper, and destroys my Oxygen, Weapons, Shields, and Medbay, starting fires/breaches in all of them. Of course, I decide to jump away, but the next 2 beacons have ships with similar, if not worse, setups. After the final ship, all but 3 of 8 crew are dead, every system but my oxygen is destroyed. I also only have 2 or 3 hull points remaining. Luckily, the one crew member I need to unlock the Mystery Ship is still alive. So, I think I can still salvage some of this run, and I jump to the exit, hoping the next sector is a Rock Homeworld, which it, of course, is not. That was sector 7. So now I couldn't unlock the Mystery Ship.
Fuck you, FTL.