see through walls, most often at 45 degree left and only in the pitch between 45degree down and up.

as seen in the picture if the cursor points diagonally left at 45 degrees on the left hand side of the screen a view of the area outside the block appears. it often appears straight ahead but only flashes for a fraction of a second about twice a minute and not long enough to screenshot. i rarely mine into lava now because the bug shows me the lava up ahead as a warning. they may be two separate bugs as the one that shows straight ahead i think does not occur at 45 degrees.