[GAMEPLAY] Vector targeted abilities get cancelled upon pressing another spell

Description: when the quick cast without indicator and the "Cast spell upon pressing another spell" options are enabled, vector targeted abilities (Viktor's E, Rumble's R) get cancelled by other abilities even though they should be fired.

Reproduction:

• play Viktor
• have Quick Cast enabled
• have Quick Cast Indicators disabled
• have "Cast spell upon pressing another spell" option enabled
• press E and don't release it - it still has indicator visible
• without releasing E, press W

Expected outcome: E and W get fired immediately

Actual outcome: E gets cancelled, only W casts

Reproduction rate: 100%

Steps to reproduction, as well as more in-depth explanation, is presented in the video I've attached to the topic.

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I've already reported it a month ago, but it didn't get any attention nor it got fixed, so here I am, trying my luck again.