I really appreciate all of the thoughts and experiences shared about this issue. I have changed to the Easton Super 3D nock. These new nocks are also a different color, in hopes that I will be able to better visually inspect them for damage/crazing of the plastic.
As for other possible causes (setup, form, etc), I’m really not sure how to effectively go about studying that. I’ve bare-shaft tuned my setup with good heavy arrows (13 grain per pound). Nock fit feels correct to me; no slop when engaged on the string, subtle “click” audibly confirming engagement.
I do recognize the risk of failing nocks hence my seeking wisdom here. I welcome any other experiences, thoughts, tips, ideas that others have had or used over the years.
Thank you! Please keep the posts coming!!