Not sure where you are on this, and I am not familiar with this model, but that has never stopped me before

My thought is to do a good cleaning and inspection. Remove the ejector rod and spring; clean them very well; clean the bore the rod sit in; inspect all the parts for wear and fit; and replace worn or broken items.
As I look (play) with my revolvers, both single and double action, my thought goes right to the spring. Based on your description I would be looking for a broken or worn spring, or a rod that is worn where the spring sits on a shoulder.
Just my 1.5 cents written in a way to make it look like two bits
