It’s great you noticed this change! There can be little chases etc. in some pairs (esp if one is overly food excited), but them becoming more distant is more of a concern. If I recall, you moved through the bonding process pretty quickly, so you may have just moved a bit too fast from neutral territory into non-neutral.
Can you move them back to a neutral spot for 24-48 hours to see if things improve again? It would also be good to observe them closely to see how they are interacting. I’ve had pairs where everything goes really smoothly in the bonding process, and then after a while one bunny (that had been submissive) decides to try to mount. In those cases they usually just need some more time together to sort things out in neutral space.
You also might want to remove the hidey hut for now, and clean the litter boxes etc. super well (or give new ones) when you move them back to their normal home.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.