If you were to /kill your self and then (after respawning) building a commandblock it will not show the building animation. I was able to fix it by simply relogging into the world again.
Environment
Win 10 x64
If you were to /kill your self and then (after respawning) building a commandblock it will not show the building animation. I was able to fix it by simply relogging into the world again.
Win 10 x64
Duplicates MC-87918