Sometimes pressing F just fails. You will run in to stagger a boss or w/e so your teammates can breathe. Once you are there you press F and all apears fine at first. At that point you realize however your relic is in hand where it should be and your guard is down. But wait your relic isnt pulsing with power it is just a dull rosette that you can’t even block with. The only way to resolve the issue is to press F a second time which causes two things to happen! Firstly your Chorus starts! Secondly your Chorus ends! Resulting in only 1 tick of your chorus taking place and a fully used cooldown.
Sometimes she holds it out like the ability is working and it just doesnt cast.
Sometimes she just holds it off to the side like a flashlight. But reguardless you have to hit F again to fix it causing you to only puff one burst of your ult before putting up the relic.
Literally just try to press F with Zealot Chorus equipped mid melee combat.
Steam
Common this happens like every 3 casts or so