Extra spell cast from "Lightning Overload" (Ele shaman talent)

[Neophrone]

This issue kinda similar to this one:
#9263

Extra spell triggered by Lightning overload talent (https://www.wowhead.com/tbc/spell=30681/lightning-overload) doesn't have any delay nor animation, it just do 50% of damage of a spell it was triggered by (both spells hit simultaneously).

How it should work:
https://youtu.be/xbOm_nVd-o8?si=HJlHZ1HR8AsLFImB&t=8

Extra spell from talent proc fires out right after spell it was triggered by hits a target.
This bug does not affect shaman DPS (as you can see on vid I linked, extra spell proc doesn't delay next spell cast it actually triggered automaticaly after first spell landed and it happened during next spell cast) but it's still a bug.