David Harmon

 
I am seeing a different sort of "end gateways fail to generate".  I originally killed the dragon in 1.16, and went off to explore the islands, where I found several additional "return" gateways scattered around the islands.  The wiki indicates that this is the expected situation.  I later respawned and killed the dragon again, but when I explored past the second end gateway, it was in 1.17.... and despite having traversed well over 1000 blocks in two directions, the only end gateway I've seen there is the one I came in by.

ETA:  Joseph Wyne:  In the past, those end gateways have been perfectly happy to spawn over the void.

At least in 1.16.3, they do last long enough to grow up, and if you tame them soon enough, they won't despawn.

The bonus chest is up there too.  As of 1.16.3.

Yes, this does not make sense as a "feature" – in particular, the old behavior let an infinite water source serve also as a sink to empty buckets into.  This change would mess up generations of base designs assuming the old behavior!  Not to mention there's no replacement behavior – with this bug the only way to get rid of a water block is to place a solid block over it.

Nope, just restarted the game (including the launcher) and tried again.  Still not breeding.  I note that immediately after the attempt the cats refuse another fish, but a few seconds later they again accept fish, get hearts, but no kitten.  snapshot 20w18.

Both of these are cats taken from a village.

And after yet another try, I found them able to reproduce but still bugged differently ... I went down to Y=11 (which is what it took for them to follow me) and tried the fish.  Now, no hearts... but a few seconds later there was indeed a kitten.

I'm getting phantoms in 20w18, and in fact just killed one and got a membrane.

In situations like this, if a player doesn't have too much invested in the Nether it may also be possible to just rename the DIM-1 directory with the dimension's data and let it regenerate.  (Don't actually delete the renamed data until you're sure that you haven't somehow screwed up....)

Still in 20w17 at least:

Took a couple of dogs caving with me... one of them tried to swim up a falling lava stream, after I'd already quenched the base – there was plenty of room. "Dog tried to swim in lava" – yep, they sure did! The other wandered across the corner of a half-quenched lava pool, and burned to death, and had no obvious reason to want to go down that corridor.

Still happening in 20w17a/20w18a, Single-player Linux

I tamed 2 cats in a village, and they (separately) followed me back to base. But then they settled into my house and won't teleport after me when I leave. When I feed them fish, they get the hearts, but don't actually mate.

Dupe of MC-181424

Dupe of MC-181424

Oh, there are many many reports of this one.

I am seeing this too.  Same snapshot, on Linux.

I note there are many reports of this.  Ryan Sharp pointed one of them to MC-181424, so I'd guess that's probably been selected as the "original".

Also, this is a particular case of MC-58862.

See MC-58862

Yup, the XP is consistently being emitted behind the grindstone (which in my case was actually against a glass pane).  I've now hung it from the ceiling, let's see if that helps next time.

I'm seeing some of these...  I tamed 2 cats in a village, and they (separately) followed me back to base.  But then they settled into my house and won't teleport after me when I leave.  When I feed them fish, they get the hearts, but don't actually mate.  Also they leave me gifts after sleeping, despite that they're on the floor below my bed (that is, they are on the ground floor, my bed is on the next level up, 3 blocks higher).  This is in 20w17a

I've been seeing them have a lot of trouble with double doors.  Typically they'll open one side (perhaps open-and-shut repeatedly), but then they'll mill around on their side of the doors instead of going through – I mostly see them stuck outside, but sometimes inside.  Me opening the shut side seems to unwedge their pointy little brains.

In related news, it would be nice if iron golems knew how to open and close double doors, especially when I left a gap above specifically so the golems can go through.  Heck, they could even shut open doors when doing their rounds at night.

ETA:  I'm on Java edition 1.14.3.pre4 .

I have been seeing villagers get stuck that way going into buildings with double doors, they mill around outside the door despite that one side is open. Opening the other door seems to let them pass through.

I just got blocks reappearing in a brand new world, vanilla 1.7.4. I was walking a friend through his First Game, and this was happening when he was punching wood and dirt. There were no other obvious in-game signs of lag (I took over the keyboard a few times), but the console screen did have messages to the effect of "can't keep up!". The effect later became erratic – it eased up while he was mining coal, then came back when he was trying to pick up his crafting table.