My customer have reported, that their APIC/ACI environment have some flapping/Intermittent issues on some of their node Leaf Switches.
(for the sample, name of the nodes : Border-Leaf-182)
From the Notification on CLI (attached) the main cause of this flapping is Loop Detection, and from this site I read, one solution to solve the Loop is that it need to enabled MCP (by now it is disabled globally):