It would help to know the model number.
I have a feeling there is a push-on spring washer that may have deteriorated and given up the ghost.
Something like this:
https://www.ebay.co.uk/itm/144134803267
But make you get the right size. There's at least 10mm and 8mm shaft diameter to choose from, maybe more.
It'll probably need to remove the decorative hubcap.
Dnfbfnf
April 2025