When Meki was going through a bit of stasis last summer, she stopped drinking water too. I did the same thing where I put a bowl in along with her water bottle and nothing. What worked was, in hindsight probably not the best idea, I got a fresh pineapple and put some of the juice from that mixed in with the water in the bowl. I think I’ve read or heard somewhere that pineapple was good for a bunny’s tummy.
Anyway, so she went NUTS for the pineapple water. Had no problem whatsoever lapping that up like there was no tomorrow after not drinking for nearly 14 hours. Unfortunately, the new introduction of pineapple juice gave her the most severe case of diarrhea I’d ever seen in a rabbit. Dumped the pineapple-water, rinsed it out, put plain water back in the bowl, and pushed hay on her. Within the hour her poo was firming up and she was still interested in the bowl even though it didn’t have some of that magic bowel juice in it anymore.
Long story short, try making the water enticing. Perhaps with unsweetened apple juice or something? If all else fails, you could try syringe feeding your bun water. Meki hated the syringe until she discovered water in it and lapped at it a little once she realized it was plain water and not ~*cherry flavored*~ antibiotics like I had previously been giving her through the syringe.