queue function breaks on casting same skill repeatedly while blocking

[kundisfreenet]

while holding block, the queue function seems to execute input differently:
when the same skill is being triggered multiple times, the queue and execution breaks upon every 3rd cast and causes weird delays.

in order to reproduce:
a) hold block and trigger the same skill roughly once every second and you'll see that there's interferences in the pattern's consistency
b) hold block and spam the same skill and you'll also see the same interferences.
c) turn the script off and repeat spamming the same skills and you'll understand.