When you introduce them it needs to be done in a small neutral area. Somewhere neither Rabbit is familiar with.
How long ago were they both neutered ? If either were only neutered a short time ago then they might need a few more weeks for the post neuter hormone surges to settle.
It isn’t unusual that a caged Rabbit will try to get out and at a Rabbit having free roam around them, but a caged Rabbit will be OK when the same previously free roaming Rabbit is caged next to them. So I wouldn’t be overly concerned about this behaviour at the moment. I would, however, have exercise time for both Rabbits away from each other, not running around the one in a cage so neither gets wound up watching the other Rabbit run about. Just have them in side by side cages, but make sure they cannot nip each other’s noses should either Rabbit push their nose into the cage of the other Rabbit
There are some tips and information about bonding here
Master the art of pairing up rabbits through bonding. Explore expert advice and resources for harmonious rabbit relationships. Start bonding now
rabbitwelfare.co.uk
Rabbits are highly social animals that live in large communities – this is essential for their survival in the wild. When kept alone, they show health and behaviour
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