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Your exit code -1073741819 is 0xC0000005 (access violation) , the host process crashed. That's a different failure than the -1073741502 in the Microsoft blog you linked, so its desktop-heap "SharedSection" registry fix probably won't help you.
The intermittent "fails as a job, passes when run manually" pattern fits an access violation: the package body usually completes, then the process crashes, which is why reruns succeed and the SSIS log shows no task error.
To confirm your specific cause: check the Windows Application event log at the failure timestamp and find the faulting module that DLL name is the real culprit.