teleporting long distances doesnt load chunks

title says all,
Teleporting at least 276 blocks into negative Z axis makes the world chunks unable to load, reloading that world fixes this problem,

Redstone seems to work in those non-loaded chunks, however, area teleport command blocks in unloaded chunks only teleport players away that have those chunks loaded,

Map in attachments,

EDIT: the above bug is fixed in 15w37a, however it has been replaced by a new set of bugs, and i have the feeling they are caused by the same chunk glitch in 15w36d,

What i mean is, now, whenever a player is teleported:
If multiple people are teleported together, at least one client crashes/gets kicked off the server,
Player positions are not updated(area command blocks dont trigger.
One or several chunks can be missing.
Players sometimes become invisible.
Etc,