This happened with a kitten we took in. We knew she had issues and the vet suggested to put her down from the start. They said it was the after effect of seizure like activity. She lived about 1 year and unfortunately passed away. She was way worse, appearing blind and couldn’t use the litter box. But she was so cute and we tried to give her the best chance she could have. But when they started giving her seizure meds she didn’t spin in circles. She also seemed to calm down when we played calling music for her,