I upgraded an established world to caves and cliffs experimental mode and flew outside of the explored chunk area. I found a large abandoned mine shaft. I found 3 spawning cages but they didn't have the cave spiders inside spinning around or on fire to indicate they were active. I didn't see any cave spiders spawn out of them.
Seed is -875330636.
steps to produce:
1 create world in 1.17.10
2 convert world to an experimental copy
3 go to the mineshaft around -1400, 14, 500 and find spawners with no spiders in them.
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v-baslod
Thank you for your report!
However, this issue has been temporarily closed as Awaiting Response.
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migrated
Yes, this is still the case in 1.17.30 Caves & Cliffs. I upgraded the same saved world to experimental mode and re-visited the mineshaft. the spawner has moved slightly and the mineshaft is now interrupted by a lush cave, so I know it is a freshly generated version. There's no cave spider spinning in the spawner and no spiders spawn when there's no light. If I add a cave spider spawn egg to the spawner in creative mode, cave spiders start spawning from it instantly.
migrated
I went to the same area in a copy of the world without caves and cliffs experimental mode enabled. the spawner was up 12 blocks, -1339, 24, -529, and there was a cave spider in the spawner. So the spawn egg only be missing when experimental mode is enabled.
Arisa Bot
Thank you for your report!
We're resolving and linking this ticket forward as a duplicate of MCPE-138291, as that ticket contains more detailed information and/or has already been triaged by Mojang.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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