Mine does the same, and has done so since I got it (about a year ago). The wipers will randomly turn on when they get ignition power, then go right back to park. This only happens once in a while, so it isn't that big of a deal. Recently though, I've had the wipers on intermittent, and they will suddenly stop working. I can shut them off and they will park, or turn them on to hi, then back to intermittent and they will be fine. The other day, I lost all but hi, and as soon as I switched off of hi, the wipers stopped where they were. After some wiggling of the signal lever, they worked fine again.
I am pretty sure my problem is the MFS (multi-function switch). Had similar problems with other vehicles and the MFS' wear out internally, usually the contacts.
Being that the MFS is pricey, and I have other more important things to repair, I will keep pushing my luck and hope that they don't fail me for the next few months.