Mobs can spawn in deep dark biome and ancient cities

Is it? The 19.10.o.x Preview Installed yesterday still has this bug?

Issue is still active. Mineshaft spawned above and the mobs are spawning on blocks below the Mineshaft as well.

This is still happening, the update didn't fix the problem, It's very problematic when they spawn near to you and a Sculck Shrieker

Affects Preview 1.19.10.22

@GalaxyGamesTOP 

It's NOT fixed

One of the reasons that this issue occur is because of MCPE-154229 (ancient city has less frequent sculk patches generating on it). because there is a lack of sculk patches on the ancient city, it gives a lot of spaces to mobs that shouldn't spawn to do so , mostly in the ancient cities. also, with mineshafts being able to generate also inside of it (MCPE-155788), it gives more space to mobs spawn and also place to cave spider spawners to generate.

Just a quick addendum to the comment above regarding sculk and mob spawning: There is currently no restriction in the mob entity definitions to prevent mobs from spawning on sculk, Both Java Edition (going all the way back to Experimental Deep Dark Preview 1) and Bedrock allow mobs to spawn on sculk outside the Deep Dark. This can be tested by starting a world in Creative Mode and doing "/fill ~ ~ ~ ~32 ~ ~32 sculk" and repeating that command after elevating enough blocks to allow mobs to spawn between the layers. After a few seconds, mobs will begin spawning on the sculk. I feel this is wrong since mobs aren't supposed to spawn in the Deep Dark, but because the behavior is present on both Java and Bedrock, such a change is a Feature Request and not a bug. So increasing the amount of sculk in Ancient Cities won't prevent mobs from spawning with the current implementation.

Still an issue in 1.19.2

Hoping this gets fixed. It isn't fixed in the 1.19.20 beta, so is this not a high priority for Mojang? It should be. I could be wrong, maybe it is.

I made an add-on that fixes this issue. I'll leave it attached.

@MountainMan395,

I'm not sure your add-on is having any effect. The existing mob definitions specify they only spawn in biomes with the "monster" tag, and upon looking at "Microsoft.MinecraftWindowsBeta_1.19.2020.0_x64__8wekyb3d8bbwe\data\definitions\biomes\deep_dark.biome.json" it lacks the "monster" tag as should be the case:

"caves": {},
"deep_dark": {},
"overworld": {}

The lush cave and dripstone cave biome definitions do include the monster tag as expected.

Also, after testing it in an ancient city just west of spawn in a new world, I saw this:

Full disclosure: The world is also running a sculk patch fix which is why there is sculk on the tall ruins structure.

So, unless there is a more general bug in the tagging system, the check for the biome monster tag in the existing entity definitions should be enough to prevent them from spawning. I still believe the real issue is due to cave biomes (like surface biomes) not being contiguous so mobs find any spot they can spawn in and take advantage of it.

Not in today's patch. Still an issue! 

Not worth exploring the deep dark till this bug gets fixed.  Glad I have Java as well as bedrock.

I know this is a confirmed issue, but for player's seeing mobs in Ancient Cities not in/near the lush or dripstone caves biomes remember mobs can come from above the cities in any biome. I see this when they come down waterfalls or spawn on ledges on the walls and then fall. Torches and boxing off the water can help in those cases. I kind of like the challenge of mobs in ACs, should be a game setting toggle players can choose in Options. Just a heads up for players who weren't aware.

I am playing on a realm on the version 1.19.20 and mobs are spawning in the deep dark.

If this were an intended feature of bedrock I would appreciate it.  Because I know it’s not intended this bug makes the ancient cities feel more like a preview of the wild update than a discrepancy between Java and bedrock.  The challenge is nice.  There are plenty of opportunities to farm Xp from the copious skulk that generates from the mobs that spawn in the ancient cities.  I agree with Ori1666.  A heads up or a toggle should be added if this feature remains.  Some players may find the skulk reward fulfilling.  Others may find it too challenging.

Affects 1.19.30.22 Preview

For those saying that it's a nice challenge, well you can see it that way but I just see it as unimmersive and kinda going against the point and lore of the Deep Dark and Ancient City's in a way. To me at least it's not a matter of being too challenging necessarily. It would surely be nice to have a toggle but in the end something tells that since this is a bug, if it's ever fixed it'd probably be fixed for good, much like some other more or less popular bugs. And I mean, a bug is a bug, and on Bedrock you really shouldn't have high hopes for it. The priority would probably to fix it, then maybe they'll add such a toggle later on for all version. Fyi it apparently still affects 1.19.30.25.

well said Ziad,  this also does go against the lore of the deep dark cities.  I thought part of their lore was that nothing survives the warden.  When players get to the ancient cities on bedrock this continuity is completely ruined and feels rather lazy.  Feels more like a market place add-on than the actual ancient city.

I've finally found an Ancient City in the survival world which I've been playing since the Caves & Cliffs release. (Currently running 1.19.22 Minecraft for Windows) but I'm disappointed to see it's crawling with hostile mobs making exploration incredibly difficult (screenshots below)

I've also created a new world based on the same seed as a test and visited the same co-ordinates to find that no mobs are spawning, so it seems to bea bug linked to an updated old world.