Not knowing the history of the gun or what all has been done to it we can only guess lots of use lead to the problem developed.
I get tons of offers to buy it including a few 2 gun trades that would make anyone dump it quicker than lightning. I dont see it ever leaving my hands by my free will. A thousand revolvers might touch my fingers between each purchase. Theres a certain shop that makes it easy and knows which revolver im going to take home before I randomly show up maybe 3 times a year. Thats how the 625-3 met my hands ... 3 625s there and while I was joking with employees as I walked in, another rushed ahead and got it out for me knowing it was getting sold.