Mojira Archive
MCPE-20436

Beacon Beam, Conduit, and Creeper Armour animations gradually slow down.

Ever since 1.0's pre-release stages, the beacon beam became slower and stuttered-looking, eventually coming to a stop.

The same could be said for the creeper armour; it moves constantly for a while, but then slows down and then ultimately stops moving (at least until the player leaves/re-enters the game).