Hi,
We had our first CH visit with Mum since beginning of lockdown. We had the same experience, Mum had deteriorated, she could only shuffle small steps held up by the carer, she looked terribly thin and frail, deep set eyes and didn't have a clue who we were. We removed our masks, she still didn't know us. She was unable to speak and after 5 minutes wanted to go back inside. She held onto the carers hands, and only interacted with the carer. We felt she didn't know us at all. We were told on weekly update calls that she was fine too. Clearly she wasn't fine.
The second visit a week later, she didn't want to come outside, she glanced at us, and just walked inside. Shes forgotten us, and we have been shoved out of her world due to covid and the whole lockdown situation. I hope you regain some nice visits again with your Mum.