Bees seem to wander off pre 1.15 generated chunks for me.
After googling a ton of different keywords and phrases, I took it upon myself to check the NBT tags of the chunk the errors were located in. In the chunk, under the "TileTicks" data values, any entry's data "t" was cleared and the issue was resolved.
The last 3 wandering traders to spawn in my world which is on version 1.14.2 have had super speed. The first 2 that I encountered were dragging llamas behind them on invisible leads. Eventually one of the leads would break and one of the llamas would be set free, but this took a while and had no effect of the trader's speed. Imagine the video attached to this post but the llamas are being dragged behind the villager at super speed.I didn't see the third one loose its llamas, but I came out of a hole in the ground to find two trader llamas just sitting next to each other not moving with a wandering trader zooming around the area.
In a new turn of events I managed to get the llamas into a boat and this solved the villager speed thing for some reason.
@Kumasasa it is most certainly a bug with minecraft, and if Apple knew what the problem or how to fix it, they couldnt because its Mojangs Game. Not theirs.
I also and using OS X Yosemite beta 4 and This is happening to me. Hope this gets fixed because I love playing minecraft and I would love to keep beta testing but If they won't fix I must revert to Mavericks
I logged into 1.17.1 and it was creating the exact same issue, maybe you guys didn't have a big enough wall of ice behind glass?