Seeding rand does not make the fuzzing campaign deterministic

(Submitted upon email request for preserving anonymity; I cannot give follow-up details on this issue)

Seeding the rand used in the state does not make the fuzzing campaign deterministic even when a single fuzzer is used with 100% stability. As such, there is a non-determinism source which is affecting runs that is unaccounted for in "standard" fuzzers.

We should identify the source of this non-determinism so that users seeking to do replayable fuzzer campaigns may do so reliably.