[1.10] Crash/Assert when using many items in Wizard School Roleplay

Verification Build: 1.10.0.0 Beta

Partner Rank: 1

Summary:
Wizard School Roleplay crashes even with asserts off when using "Invoke Lightning", "Call Broom", "Leap", using the "Training Grounds button"

Impact:

Crash. Unplayable

Repro Steps:

1. Download Wizard School Roleplay from Store
2. Create world from template
3. Approach chests and take the "Invoke Lightning" item. Right click anywhere to use it.
   1. OR take the "Call Broom" item.
   2. OR take the "Leap" item.
   3. OR tp to -148 102 139 and press the button
4. Observe the crash.

Observed Results: 

 Crash

With asserts on you get:

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Assert Failure - ctrl+C to copy this message to the clipboard!
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Assertion failed: Can't generate a number in [0,0)
Condition is false: n > 0
Function: Random::nextUnsignedInt in f:\darwinwork\6\s\handheld\src\common\util\random.h @ 169

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OK
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Expected Results: 

Nothing

Screenshots/Videos attached: 

No