Duplicants won't automatically use hospital med beds after getting injured, even if you manually assign the beds to them. (Reloading the save file resolves the issue.)

As the title says, duplicants won’t go to medical beds on their own when injured, which is different from regular duplicants. I have to reload the save every time. A similar bug is that if a rocket module has been modified, all duplicants — including these units — have a chance of being unable to enter the rocket module.