[GAMEPLAY] Spells fail to cast directly after a move command

I right click, then immediately hit Q (or any spell), the indicator either flashes on the screen or doesn't come up at all depending on the timing, and it is as if I haven't pressed the button at all.

Its as if the move command cancels the spellcast, despite the move command being input very obviously before the spell command.

Its affects gameplay the most in ganks and teamfights, so it is very frustrating.

Other info:

• I do not smartcast
• Tested with near 100% reproduction rate
• Only started happening since 5.7 - noticed it immediately (edited)