I haven't had any problems with my Pentax 67 with MLU for years. A few weeks ago, the film advance lever got stuck and it look more effort than usual to get it to go back. Since then, I've noticed the first and second frames on
some rolls overlap a bit (examples attached). Since this is only happening on some rolls, is there anything I should be doing to avoid this? Should I just be especially gentle when I advance my film now? (Not that I was being very rough with it before.) I've read online here and there that this happens to some people and they seem to then avoid it going forward somehow. Or am I better off just sending it in for maintenance? Unfortunately, I don't have any equipment to tinker with it myself. Any advice is appreciated!