..........did this with mine.Could you try spraying a silicon spray into the joints and behind the glass, see if it improved things...?
https://www.abbuildingproducts.co.uk/GBR/soudal-silicone-spray.html?utm_source=utm_source=googleshopping&gclid=EAIaIQobChMIhfXW8YeQ3wIVTbDtCh0mRQMMEAQYASA
Looks good, I hear a clunk sometimes before it stops as if the spring is stuck.
Was it easy to get the mirror off as I would rather give it a go myself than leave it in the dealers?