Mesh link issue

We faced with a crazy issue with the mesh links. At first our mesh links operates at 5GHz and the same radio is also serves the wifi users. The issue is appear at random times during the day and at these times the mesh client could not ping anything (and of course our users don’t have connectivity) but at the same time the mesh client ap has full connectivity with cnmaestro (all tools are operational (including debug) except network connectivity …