DMC3 2006 PC port came out-of-the-box with the despawn glitch, which has two types:
Regualr Enemy despawning is usually not consistent while Wave despawning is. Although, it has extremely high chance to cause the game itself to crash.
At the moment Dante takes advantage of this the most due to the nature of RG sweep. Although, Vergil can still create framework for replicating the despawn scenarios.
Mission 2 Wave Despawn - hies method
Vanguard depsawn during Radge attempt
Mission 12 Temperance Wagon Wave Despawn by Simoteus