Fallen Protectors Bug

Hi guys, i've a question about Fallen Protector on Siege of Orgrimmar's.
Previous week, we kill this boss but the wall which should disappear after killing Fallen Protector doesn't disappear. We skip it with warlock summon and blink, but after we wipe on 3rd boss, it becomes impossible start again the fight as the Fallen Protector wasn't dead.
This week, Fallen Protector's adds become unkillable during the 66% of Sun, making the fight impossibile, cause Sun and others bosses become invulnerable.
It's happens only on my guild or there is a trick for avoid this ?

This bug happen time to time, while the 1st bug is rarely happen it is devastating coz not even server crash/restart fix it. On 2nd bug just get out from raid and wait 30 min for raid reset automatically and you can redo the encounter.

Thank you so much ^^