Since updating, I've noticed this glitch on both my computer (MCPE:W10) and phone. It essentially is a random camera jerk (either up or down and about 90 degrees to either left/right) while I am building and moving at the same time. I've tried to use different block, but regardless of the block and direction I'm moving, it always seems to occur when building is quick succession.

Edit: Only have tested with touch. I've used XBox controller on PC and no issues there. There is little/no lag when I build (for clarification).