Limitation of attacking the same player

It often happens that the same player attacks the same opponent... I have been defeated a lot of times by the same enemy who then defeated me a lot of times. I came across some steempunk-related posts showing the same results.
Players who are not playing that often fall victims to other ones... maybe there could be a limitation in order to prevent players grinding for level-ups by limiting the number of attacks to an enemy to once a day as long as the player was not logged in for the last 24 hours.