Destructive Play + Interference = bug

Hello, I'm a content creator (or at least I try).

I recently tried to revive a farm I do every league.

Using Destructive Play with the Scarab from Interference.

When using it with Elder maps, in the first phase a boss is summoned according to the scarab, but if you don't kill it or if you kill it and don't collect the loot, you lose it.

In the third phase of the fight, a ton of bosses appear.

Is this correct? And if it is correct, why don't we have enough time to kill the boss that appears in the first phase and collect its loot?

https://www.youtube.com/watch?v=U1pgm38nUgg