I have some issues with sass themes.
My context : Asp.Net MVC & scss files from https://github.com/telerik/kendo-theme-default
1) IE11 & grid
There are positioning problems with the filter, column and refresh icons on the grid (cf themebuilder & filter icon on header).
One of them comes from the use of nested calc for the bottom property
2) IE11 & charts
When launching the themebuilder/asp.net on IE11, the first time the charts don't display correctly.
If we change the theme via color swatch, they are OK.
3) Tabstrip color
When you put an item (Treeview, ...) in a tab, it takes the main color ($accent) instead of the text color ($text-color).
This is due to the class '.k-tabstrip .k-item' which must be replaced by '.k-tabstrip .k-tabstrip-items .k-item'