I'm exporting proxies as Scrapebox file - in this format the export files should contain nothing beside of IP address : port number. I've realized, that after a certain GSA Proxy Scraper update the export file began contain empty lines, and some proxy addresses get from time to time a S character on address beginning, like ?.?.?.?:1080, which becomes after an adding of some new addresses S?.?.?.?:1080.
Could somebody explain me this behaviour?