PreventSlimeSplit option broken with "Despawn: False" on all branches of MM.

Despawn: false seems to break the "PreventSlimeSplit" option on all current versions of MythicMobs.

Tested Paper #100 and #111     
MM 5.3.5 Free Stable, MM 5.3.5 Premium Stable and MM 5.4.0 Devbuild 555ec615.

Test Mob:

SlimeBoss:
  Type: Slime
  Display: '&2&lOverwhelming Ooze'
  AITargetSelectors:
  - 0 clear
  - 1 players
  BossBar:
    Enabled: true
    Title: '&2&lOverwhelming Ooze'
    Range: 70
    Color: GREEN
  Modules:
    ThreatTable: true
  Health: 5
  Damage: 3
  Options:
    Despawn: false
    Size: 20
    PreventSlimeSplit: true

No errors in console.