Prior to giving up bonding you need to look at how you are bonding, is it is totally neutral territory, is the space too big, can you rabbits smell or see other rabbits, is the periods between incidents getting shorter or longer or remaining the same, what are the signs in behviour that the rabbits are showing each other, do you have adequate time to continue supervising them.
If you are not using the correct sizes space, the area is not totally neutral, they can see other see or smell other rabbits, the bonding space is too big these need to be corrected.
If there are either the same number or more incidents in a 24 hour period, the incidents are getting worse or they are showing more aggressive stance to each other then I would abandon.