I mean this as respectfully as it can come across in a forum.
I understand that its difficult, again thats why I suggested the whole idea of bringing the issue directly to you. However If the dev team is incapable of reproducing a crash that gamers are experiencing year after year, knowing that there is some issue that is causing it, based on forum posts. They might need to re-evaluate the talent.
If I myself at my job (I work as a Sales and Electrical Engineer) had an issue troubleshooting something on one of our products that I created, and after years I kept failing to find the cause of the issue, let alone fix it, I would be fired end of story. While I understand that all you personally can do is pass along the info you are obtaining, the fact remains that the issue persists and as gamers we are all tired of hearing the some thing over and over. Perhaps a formal statement from the Dev team acknowledging the issue would be helpful, whether it be on Social media, or on their website as a “update” release.