Resistance to Loving-Kindness
How can this be explained?

That's aversion towards the meditation practice. Just note it as &quot;disliking&quot; and be mindful about it until it passes away. Be very vigilant in observing this aversion when it arises as it can sabotage ones practice if left by itself.
Eventually, as one gains more and more clarity of mind, this aversion will subside due to the mind understanding the benefits and freedom that comes from consistent meditation practice.