Buckets bug

Hey I got the paid version of Minecraft PE and I like the 0.7.1 update with all the bugs fix but there's a bug with the buckets, when I use the bucket over 4-5 times maybe more or less the bucket disappears and I had 10 buckets which is about 30 iron now I made a new one and it also disappear please try to fix it I know you guys can.