May be related to https://bugs.mojang.com/browse/MCPE-46396
Skeleton spawned in my house with no spawn able blocks, all slab floors. Spawn was also only 10 blocks from me. Similar incident some time back with creeper, both times on getting out of bed. Rare but significant issue for me, not consistently reproducible. Using current android build of bedrock.
Given sample of my villagers new trades by providing mire workstations . This works although they are not retaining their previous trading experience/tier. Starting new team from scratch fairly tedious with new model. Librarian books show obscure marks instead of what their enchantments even when unlocked (not sure if this is intended yet) which really means I can't have a village but will be forced into making a trading hall which is disappointing. I enjoyed thm bustling around as a village. May be bad luck but their prices are now outrageous too...
In my case there are no other villagers for at least 500 blocks, more by taxicab...they are Ali walled into an approximate 4 chunk space so no far from beds.
I have placed approx single chest full of beds, which is approximately enough so that should have left only a few, if any, homeless...
I'll experiment with additional trade blocks. But I had some good trades which I'll certainly lose if I have to do that for all of them. That approach in essence is the same as simply killing them though...
Using updated 1.11.0 bedrock version my villagers now don't show the "trade" icon/dialog at all. Appears to be similar behaviour in my creative world if I spawn villagers, still no trade icon or dialog.
Icon and dialog appear when creating brand new world.
Reproduced by me in 1.10 bedrock running on android. Creeper spawned in my well lit base on top slab floor. No other mobs of any type has ever spawned. Appears to be very rare issue but certainly exists.
I believe that many slime Chunks as calculated by tools really are normal Chunks. I now have tunnels and openings for thousands of blocks and only seen slimes spawn in 2 or so Chunks. Mined out a 4 chunk space from y7 to y40 where mapping tools agreed there should be slimes. None have ever spawned for example. Ground level and adjacent caves torched for 64 blocks each way too. For the nearest working chunk to spawn I can run in and out and 1 to 3 slimes will spawn pretty reliably and keep respawning. Caves torched here too, but never killed every last overworld mob where it is working...
Overall impression is there a way fewer operational slime chunks than expected, regardless of mapping tools not identifying them accurately.