Hmmm, bonded pairs can sometimes go through little rough spots. Have there been any changes in your home?
Her stasis episode certainly could have had something to do with it (or any lingering effects). My Bertha was previously bonded to Moose (he passed away due to serious medical issues), and they would have issues whenever he was not feeling good (particularly when he was having dental issues).
Did you ever figure out the cause of her stasis? Sometimes dental issues can cause stasis, and also cause changes which affect the bond. Given that Lady is also not coming out of her condo as much, she could be in some pain of some sort.
There are some things you can do to work on their bond, such as some marathon sessions in a neutral space, and stressing, but I think you should rule out any underlying medical issues with Lady first. Typically with any behavioral change in bunnies my first thought is that they are in pain of some sort, because they hide it so well. Pain can affect bonds, because maybe she doesn’t want to groom or be groomed as much, so Tramp is confused, or at least picking up on the change.
Do keep a close eye on them. If it seems like aggression is building between them and you see a decrease in positive behaviors (grooming, cuddling, etc.), you will need to separate (but keep them close to each other) unless you can supervise.
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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.