[2020] With the new update the infallible achievement is still locked for me (Steam)

We're still looking into how and if we can apply them retroactively - so 2.5 was just the fix for rewarding them. It doesn't mean never - just that it's taking a while for us to figure out. Bare with us until we can solidly update on that, and sorry it happened to you :(

Yep! And well done on getting the achievement. I haven't even come close. Lol.