I first noticed in 4382 that the fusion blaster rifle shots go through enemies and only explode at maximum range. I don’t think they do any damage along the way (the explosion afterwards makes it hard to know for sure).
I tried it this morning in 4454 (downloaded last night), loaded up the save, and tried it again, both in an open area and against a solid object (lab wall) - the shot goes through the solid walls and explodes at maximum range, as if the walls weren’t there. I can’t imagine that is intended.