[Baertram]

Seems to work normal for me.



You can simply test it with a blank addon and disable ALL other addons and libraries:

local updaterNameUnique = "FyrMiniMapPOIPinsD"
    local unregisterAfterCalls = 0
    local function FyrMM_POIPins()
       d("EVENT_MANAGER:RegisterForUpdate called: FyrMM_POIPins")
        unregisterAfterCalls = unregisterAfterCalls + 1
        if unregisterAfterCalls == 20 then
            EVENT_MANAGER:UnregisterForUpdate(updaterNameUnique)
        end
    end
    EVENT_MANAGER:UnregisterForUpdate(updaterNameUnique)
    EVENT_MANAGER:RegisterForUpdate(updaterNameUnique, 300,  FyrMM_POIPins)