Effects don't wrap around into the negatives at 128

• In the java version , using commands to get an effect with the amplifier between 128 and 255 makes it negative. This is very useful as it's the only way to reduce jump height. However , I tried to make a command block which makes you unable to jump via jump_boost 50 128 But there is no wrap around into the negatives on pocket edition. Instead , it makes you jump even higher than the maximum jump height of 127 in Java.Please fix this bug so i can be able to make a command block which makes you unable to jump. Also it's 1.0.5 but I can't figure out how to set the version affected to 1.0.5 so I did 1.0.5.54 because it's the closest thing I could figure out how to do.