reappeared at version 1.10.2
fixed at 1.7 and 1.7.1
this bug still on the new snapshot
happendt for me
give us a command
not exactly 4-5 and some times 0
you didnt put all of the command/give @p minecraft:bow 1 0 {ench:[{id:49,lvl:999999}]}
added new step
reappeared at version 1.10.2