Your options are essentially to deal with it or ask them what’s up.
Personally I wouldn’t waste time with co-workers who are being rude.
They could be jealous of your position for some reason or taken offense to something random you did. They may just be assholes.
At the end of the day you’re there to work and if it doesn’t affect that I wouldn’t bother.
If they are increasingly hostile maybe have a quiet word with HR.
It was always a big deal. But back then it was often pretty obvious when it was a fake. It’s getting harder and harder to tell.