Minecarts with chests only travel about 100 blocks then stop. They will start moving again when you get close to them.
It seems like they only move when you are close enough to them.
MCPE-99412
Minecarts with chest only traveling about 100 blocks
Resolved
Works As Intended
0
chunks only update if they are within simulation distance - if you want minecarts (and other chunk updates) to work beyond this range use the /tickingarea command (wiki link)