There is a potential problem with current metadata POST KIs that always use ENTRY_LEVEL reasoning (for performance reasons) that might not trigger non-metadata REACT KIs that want meta information supplemented with the POST.
Create a unit test that checks this behavior to verify if the problem indeed exists, and if it exists, think about a solution to this problem. Simply increasing the reasoning level of metadata KIs probably has very negative impact on the overall performance of the KE, so not sure how to tackle this.