Ocrevus and worsening MS symptoms

Hi everyone! Ive just joined fhe
I care for my mum who was initally diagnosed with MS in 2006. Initially my mum was on Tecfidera from 2019 up till August 2023. From the start of 2023 we started to explore other DMTs as her symotoms especially mobility and balance were deteriorating. She had her 2 infusions of Ocrevus done in December 2023, we now know they done the last infusion was done whilst my mum had a UTI. Since then, my mothers mobility has been decreasing a lot faster than we expectes and this is really concering. She is due for her second infusion next month but we are very sceptical despite the neurologist advising that its safe as we have consulted with them and nurses. Any people with a similar experience? Or thoughts on this? Worried fhe next dose will continue to have a negative effect…