Editor bugs out a little

I thought that I make small area for testing purposes, but there are few things which I find which might classify as a bug, not sure if it is my settings, but near clip seems not to help with disappearing terrain pieces:



That tends to happen only with edited terrain, untouched terrain is not disappearing.

I did generate 2048 terrain with noise option, I used empty map template to start with.

This little hump appears always when I edit terrain, I believe it is known 0,0,0 editing bug. I can't look it any closer, thanks to first bug causing block of terrain to disappear:


This holy totem of bugs also appeared sometime I was smoothing out those sharp cliffs, you can see 0,0,0 editing bug (the hump) being near floating house:

You may ignore floating house, that is my doing, just needed something for a scale as somehow it is easier than grid for estimating sizes.

Another thing is this tooltip on bottom right, it kinda cuts out at climax of the story, like when you are opening a door of treasure chamber and suddenly wake up, well you get the idea


Probably all known things, maybe some even might know solution to make terrain not to dissappear as I find it bit difficult to finetune height from the distance?