Is direct data transfer from PCM_CLC to PCM_CLC transfer stable?

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Hi Experts,
Currently we have a quick mode integration build which pulls data from PCM_CLC (source) with Scenario1 and pushes the same to PCM_CLC (target) to Scenario2 and it is working fine. What we have observed is some times moving data from PCM_CLC to PCM_CLC give some issues and because of this issue we used a different approach where we pull data from PCM_CLC (source) to a file and using that file we push it back to PCM_CLC (target) to a desired scenario. My question is direct cube to cube transfer stable?