It's somebody in our team, many people seem to talk behind her back and really dislike her, she's had a lot of warnings etc from management too.
We work with vulnerable and elderly people and sometimes I do wonder if she is on the autistic spectrum and/or has ADHD. This is because she has no filter whatsoever, says things that are incredibly inappropriate and you can see people putting their head in their palm and dying inside with some of her comments. It has got her into trouble so much but she seems oblivious to it and doesn't realise.
Something strange that happened last week was with the bike that I ride to work, I had left it in the bike area and she knows which one mine is. I went back on it that afternoon and the seat was suddenly a lot higher than before. I was puzzled and asked her if she had hired my seat, to which she said yes. I think she was just trying to help but I could not understand why she had hired my bike seat without me even knowing or asking her to.
She will sometimes whisper about clients when they're right in front of us too, I don't respond but it's just rude and makes things very uncomfortable.
I don't want her to get into anymore trouble, I don't know if it's best to gently say something though I don't want to offend or upset her. It's not nice that these colleagues keep talking behind her back, though I can see their frustration as it must be embarrassing for them to hear these inappropriate comments and jokes constantly and to be made to look unprofessional. Not sure what else to do.