@ultra-magnuss I haven't looked at this in a few days. For now I have remapped my buttons to not use the start and coin up button. I leave a putty session open to turn the volume down if someone hits it but I would like to figure out how to fix it. It's not as urgent for now since I have a kind of workaround but I would like to figure this out. I'm sure it's a configuration somewhere but don't know where.
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first