100% sure. I asked 5 different Swedes yesterday from varying parts of Sweden to see if it was a regional dialect thing. All of them said no and that you would never say it. The 'r' at the end of a word does not carry on to the next word. I think a lot of confusion can be coming from the fact that the automated voice is not doing a very good job on pronunciation with some words.
Can you clarify what you mean by this? The Swedes I know pronounce a word like socker with is a very distinct "s" sound, but maybe there is regional variation? In a name like "Kerstin," the 's' does turn into a 'sh', but that is partly because it is next to an 'r.' Same thing for "forsen." But in words like "simma" or "strax", I have always heard the 's' as a very true 's' sound.