Battlecry Ring and Channel Rune

[Amadora]

If you have Battlecry Ring equipped, you cannot use Channel to regain focus.

When I do die, 99% of the time from fall damage, I have to pop my battlecry ring off in order to channel my focus back to full so my full focus gems can apply their effect.

[sBAM]

According to Tengu on Discord, this only happens if you previously had a loading screen. Source

[DaitenguXIII]

when equip with battlecry ring it make you unable to use channel rune.