Currently, Manjaro sends mixed messages when newer but not recommended kernels are available. There is (at least in the KDE edition) a popup that says that a “newer kernel is available, please update”. I’m quoting the phrase from memory, I law saw it a few days ago after the last update.
But then inside the Kernel System Settings Module, you see that you’re already running the recommended kernel.
It would be better if the popup was suppressed if the recommended kernel is already running.