Nursing home roommate assignment. Any advice?

My mother entered the skilled nursing wing of the nursing home for therapy. She has dementia secondary to normal pressure hydrocephalus which is often misdiagnosed in elderly because it looks like Alzheimer's or other dementia diseases. She had surgery to relieve the pressure, however, she was almost invalid before a doctor looked past the "Alzheimer's" label to look at the "big picture". Neurosurgeon said it will take time and patience for her to make progress. She has dementia type behavior and is wheelchair bound (cannot walk at all) and has expressive aphasia (unable to find the words to say what she wants) She just entered the nursing home wing a week ago. She was in a room without a roommate. Yesterday she got a roommate. The roommate appears to be bedridden, blind, hollers out, moans and cries out rather persistently. While my mom does have dementia, also, this roommate is really disturbing my mother. Mom gets upset by the sudden outbursts of the roommate and fusses at the distressing sounds. Am I out of line is suggesting this roommate is disturbing my mother? It just seems to be lacking respect for my mother. She should be able to "rest" and not get upset by the roommate.