I have a problem with my 2014 Lexus ES 350. The wipers work ok normally but the intermittent wiper setting is not working. If I move the switch to shorten the interval time, the wipers cycle once and park. This occurs no matter which time interval is selected (long, medium, short). All other wiper functions work properly. Has anyone had this problem or know how to fix this? This is NOT a rain sensing system. Your help is appreciated.