dmitry.lukyanov discovered an intermittent bug that occurs when running a subset of the FLE corpus tests: specifically, this error will occasionally be thrown: `key should have length 96, but has length 0 `

This bug occurs 100% of the time when running the tests without a debugger attached, but the tests will occasionally pass if a debugger is attached, pointing to some sort of race condition.

Edit: attached the subset of the tests that we were seeing the problem in