[Elder Guardians] Destructive Play not triggering if you kill the boss in 3rd phase too fast

Applies to Elder Guardians as far as I know, if you kill Elder Guardians (I killed Constrictor) too fast, Maven doesn't despawn and instead says "Grip of the infinite" infinitely.

Does not spawn other 3 bosses as well.

Elder does his usual business of sucking a guardian dry

Was "fixed" a few leagues ago to where she now has like a 90-95% chance to still use Time to Up the Stakes which spawns the bosses after the main boss is already dead. Before that patch it was consistently no bosses were spawned.

Has already been reported dozens of times since then, no change yet. It is not specific to Guardians, it applies to all Maven witnessed maps. It is just a low chance she doesn't spawn anything and just floats there. All you can do is wait until she uses the skill before attacking once you have "too much" damage if you want to consistently get the extra bosses.