This is more of an Xbox issue, my guy. Either call 1-800-4MY-XBOX (1-800- 463-3863) or go to support.xbox.com and ask for help there.
Windows 10/Xbox One Bedrock Edition on Hard Mode. two Pillager Outposts checked. Once all Pillagers are killed once, a single captain respawns and that's it. If that captain dies, I never see another pillager in the tower again. I've encased their spawn point in stone, so it is completely dark to no avail. Is there an ETA on a fix at all?
EDIT: Forgot to mention: I've only ever seen 1 patrol that spawned under my friend's house and I've done 3 raids already.
That's what I've been doing to get the single captain or 3 pillagers to respawn in the first place. I've even gone into creative and tested this and still ran into the same issue. I don't know what could be causing this. The area is always dark enough, I'm always within spawning distance or further if I try to come back after a bit. It always runs into the same issue time and time again.
EDIT: So after a bit of testing, I've come to find that the lighting prerequisite for spawning Pillagers is most likely to blame, as previously stated by silentwisperer above. I've encase the entirety of the spawn layer (top floor) of the Pillager tower in wood and flown straight upward for about 30 seconds - 1 minute at a time to find a Pillager in there. They spawn one at a time instead of in a group or rapidly. It seems to take them forever to spawn, even under the proper lighting conditions. All other floors in the tower are lit with one block of Glowstone in the center of the room and all banners are still present on the tower. One other issue may be other mobs being in the tower, which may have been fixed by the Glowstone being in the lower floors.
EDIT 2: Upon further inspection, it seems the floor below the top of the tower (Floor 3) needs to be lit up? I've removed the Glowstone from below the top floor and tried spawning them by flying upward and nothing happens. If I replace the Glowstone and fly up for 10 seconds and come back down, one has spawned. Some have been Captains, others haven't. I haven't a clue as to why a single floor being lit would cause this issue, seeing as they spawn just fine upon initial discovery of the tower. I'm going to try introducing natural lighting to the top floor as well as replacing the staircase that was there from world spawn and see how it goes.
EDIT 3: Walls removed from top of tower, stairs replaced, spawning fine. It's seems to be the floor below's lighting. Can others try this and confirm whether or not this works as a workaround for the time being?