This is going to seem like a stupid nit-pick, but I think it's symptomatic of your experience.
COE actually stands for "Correction of Error", not "Cause". It may seem like a trivial nit, but to me it underscores that the essential purpose of the process is to correct errors, not simply to identify causes and blame them on someone.
That you or your org or your partner teams seem to be using it not as a tool for correcting errors but for blame, is probably just one of many symptoms of rot within your corner of the org.
COE actually stands for "Correction of Error", not "Cause". It may seem like a trivial nit, but to me it underscores that the essential purpose of the process is to correct errors, not simply to identify causes and blame them on someone.
That you or your org or your partner teams seem to be using it not as a tool for correcting errors but for blame, is probably just one of many symptoms of rot within your corner of the org.