I used a Vivoactive HR for 2 years before switching to a Vivoactive 3 last month. Is there a different technology in the touch screen? With my previous watch, I never had an issue with phantom touches while in the shower, but the VA3 is always swiping through screens and sometimes selecting menu options just from the streams of water coming from the shower head.
I normally only take the watch off when it is charging, so this behavior seems unusual compared to what I'm used to.