UE 5.6 - while cooking, freeze happens with multiple HTTP timeouts and awaits after DDC forever under UNiagaraSystem::WaitForCompilationComplete()

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Hi,

Just reporting in, as I’m seeing upstream efforts testing upgrades to 8.16.0 / 8.15.0 (the last change being a revert back to 8.12.1).

We also were affected, only on our 5.6 testing branch (so with curl 8.12.1), by similar cook hang in DDC requests.

Reverting back to 8.4.0, also solved the issue.