commands turn into ###

when I was writing commands in realms, on one specific commandblock, all command I wrote turned into ###.

It may caused "specific sentence". I can not use the coordinate (3214 11 3216). Once I use it with fill, clone, or testforblocks, whole sentence is destroyed.
In addition, "~ ~1 ~ /excute @e[c=1]" has also destroyed ,but this doesn't destroy others but only itself.

This occurs when I update commandblock. Command I made in old version works in safe till I update it no matter it contains the sentence above.