i was trying out the new snapshot to find the water temples so i typed in the seed "-7185414603555797276" without quotes then the first few chunks loaded fine but the rest were invisible.

heres a dropbox link for the short video
https://www.dropbox.com/s/i11r0dkhbl3c70a/vid.zip

UPDATE: for the chunks that successfully loaded any block obove y=63 become invisible