I've started a new world with 1.12-pre.2, and it seems like if I go a couple dozen blocks in any direction from my base I enter temporally unstable territory and my temporal meter starts ticking down (And I here the gear rumbling and pulsing sound). I haven't tried venturing very far from my base to see if this affects everywhere, or just the immediate surroundings. The meter ticks down much slower than when mining down very deep it seems though. Also while I'm not 100% sure, I don't think this was the case when I first started that world. It seems to have started at some point.
I was wondering if that is intended behavior, and if so, how the player would be expected to deal with that.
In addition to that I found two bugs. But since 1.12-pre.2 is not a release candidate I'm not sure if I should open bugs for them.
One is trapdoors, placing them anywhere seems to crash the game immediately without exception.
The other is placing logs on the ground below oneself allows the player to glitch through a 1 block thick ceiling (I haven't actually tried thicker ceilings, I don't fancy it going wrong and getting stuck)
/Edit: venturing out a bit further, there seem to be some more temporally stable pockets. Will have to test some more.
