Loremaster achievement unachievable (pun intended)

So is the loremaster achievement some sort of anti-completionist achievement?

It's the only achievement on steam that's sitting at 0% (or 0.1% depending on where you look for it).

My friend and I like to go achievement hunting for coop games such as these, we've already gotten every other achievement a long time ago and are nowhere near completing this one. There are too many codex entries and their drop rate is abysmal. We even started hunting for it specifically by prioritizing missions that have a chance of dropping it, and yet we've only found 2 in the last 20 hours or so of gameplay...

Really wish they would either bump up their drop rate or at least reduce how many you need for the achievement to pop (say 5 or 10 instead of "all the Data Archives")