First review on the Trek site says so too:
Innovative design. Unfortunately, the gel grips became sticky and started peeling away within 1-2 weeks of purchase of the new bike. This was in a tropical climate, so that may have had something to do with it. Now, a year later, I cannot buy any kind of grip to replace them because the handlebars are unique: they are intentionally crushed into a "C" cross section where the grips seat (see photo), and nothing other than the gel grips with a special end plug will seat and clamp properly. Now I have to buy a whole new handlebar just to get grips that won't turn to sticky mush.
https:/www.trekbikes.com/us/en_US/equipment/cycling-components/bike-handlebars/mountain-bike-handlebars/bontrager-satellite-plus-isozone-and-inform-satellite-mtb-handlebar-system/p/09171/