Hello,
I don't know if it's a bug, but the boss keeps skipping ITS OWN dps phases at times and proceeds to switch sides even when successfully CCed.
Also, right before the second whirlpool/spear section, the boss gets invulnerable for a solid 20-30 seconds, without doing anything... so we all just stand there.
The timer is already very short, the tail very hard to target (sometimes the damage numbers pop under the platform...), these things really don't help completing this meta.