Had the same experience (without asterisks), last night!
Of course, in a useless effort, attempted to provide a bug report about how the auto wipers run too fast/often in light rain to the point of dry wiping and, as usual, the system thought I was commanding the wipers to max speed. Oh well.
So, side note, when the voice commands for wipers work, does anybody know how to set them to each of the levels? Auto is pretty straight forward and "low" or "one" does the bottom intermittent while various things raise it one level but I can't figure out how to command low/high continuous wiping or high intermittent wiping. I've tried asking for wipers to the number of hash marks but that doesn't work at all.
As it is, if I get tired of the auto wipers (which have gotten better), I'll turn them off and use the mist button as necessary or use low intermittent until there's enough droplets to warrant turning auto back on. Even though I'd like the other modes, I guess I don't generally need them.