ticking issues
MCPE-36769Ticking areas cannot be removed in the same tick that they are created
Fixed
MC-140726crash "The game crashed whilst ticking entity"
Duplicate
MC-143626Setting blocks to a block containing age block data (without physics) will cause ticking exceptions/world corruption.
Invalid
MCPE-128065Custom Blocks Using Ticking And Placement Filters Break When Ticked
Fixed