cabal DC error Notice

I've noticed, if u delay while using BM - in this case , referring to FA's bm3-
when u DC u do not get any code, just a regular DC .
but if i Delay and DC while using Skills, i get a Error Code.

what do you guys think ? it is safe to use Delay with bm , ? JUST BM , No Skills.

u will get error code with bm3 too u were just lucky
i tested and i got it
if spamming normal skills u get dc faster ofc