I have been having the issue in 18w43c as well. So far, all I've done in the version is fly around the world a lot, but the world continually fails to load in, freezing and loading a few chunks, then freezing and loading a few more, and every once in a while freezing and then loading in everything around me as expected. It continues this cycle regularly until eventually, around the time when I'd expect the world to load everything normally, the entire game simply crashes.
[media]
Edit: I tried running in Java 11 as well just to see if that would fix anything, but it didn't.
I can confirm this is still an issue in 1.13-pre release 5.
I'm not entirely sure, but it seems like it may have improved a tiny bit from 1.12.2 though.
Confirmed for 18w14a.
Sorry, I'm still trying to get the issue to happen again. It is on and off every couple weeks. I'll have the problem for a month or so, then it's just gone for the next 2 weeks, and it suddenly comes back. It's somewhat there still, but just not very severe. There is nothing unusual in the logs, but from what I can see, the display_update thread's usage rises a lot, from about 3 to 12% after moving my mouse around a lot.
Confirmed for 1.12.
Confirmed for 1.11.2.
It'd be really great if the sound engine didn't limit how many sounds could be played at once as I was building a noteblock song, but it ignores half the notes...
This is marked as a duplicate of another issue, but that one is marked resolved because it's "too hard to change".... Overall, I'd say support for Minecraft's issues is fairly good, however that is coming from the Java edition. I tried playing Bedrock with my friend on mobile recently, and I am appalled by how awful this version is. Major game breaking issues are ignored and the community means nothing. The game even comes with ads built in, even though we already spent money to get it in the first place... I wasn't going to comment, but I hope someday someone actually pays attention to these problems...
https://bugs.mojang.com/browse/MCPE-19393