July 26, 20187 yr I remember fighting her in the cave and I've got her the grimoire, but I never got the pistol. I've returned there to see if I did miss something, but I didn't find the weapon anywhere.
April 6, 20196 yr I have just experienced this bug in whatever the current version is as of this post (I think 4.1.2). I got the grimoire but no gun.
February 8, 20206 yr ran into this issue today. Build is: 5.0.0.0040 EDIT: I still had a savefile from before the cutscene started where eccea leaves the group. I waited until she sat down - she dropped the blaster this time. So maybe you have to wait until she is sitting down. At least I've got the item now, just wanted to let you know. Edited February 8, 20206 yr by BlindDruid could replicate it and got the item