popupTable works fine with mapview when I use only one column but it stops working when defining multiple zcols, eg. mapview(map, zcol=c("variable1", "variable2", popup=popupTable(map, zcol=c("column1","column2","column4")). For every popup on the map (polygon data) it shows the first entry of the dataset, it seems to disable the links to Feature IDs, as the Feature ID on every popup is 1. Using mapview(map, zcol="variable1", popup=popupTable(map, zcol=c("column1","column2","column4")) works just fine.
Any help would be much appreciated.