Since reaching tear 7 science (high velocity deconstruction level) my dupes stop using the materials study terminal after some time in the game.
The terminal has radbolts but the errand tab is empty. If I restart the game the problem is solved for some time. changing research or priority does not help.
It is very annoying as this makes doing the research very slow.
Unknown, as the time between loding the game and when the materials study terminal stops working is difficult to pinpoint. typically it takes around 1 to 1.5 hours (I think).