i think what most think is a bug is,

skill used - get interupted - wait 4 rounds (CD)
skill used 2nd time - get interupted - wait 4 rounds (CD)

dont use skill - get interupted - wait 1 round (CD)
dont use 2nd time - get interupted - wait 1 round (CD)

then ofc the interupted rounds is depending on who use it (1-3 rounds) but the SKILL CD is what can be realy irritated if you get 4 cd round for 1 round immoblice

and i think the thing that make most look into this skill is that its 2 uses then 4 cd but if you get interupted when you used 1 time it go right into cd for the 4 rounds