I am currently working in Telerik v2019.3.917 and .Net 4.5.2. I have multiple theme's setup for a local application for my users but I am seeing something odd with the Telerik.WinControls.Themes.HighContrastBlack theme. It appears that I am unable to select more than one cell in this theme. My grid has multiselect as true and SelectionMode as CellSelect. I have tried holding ctrl and clicking cells, clicking the row header, holding the mouse down and dragging, and using Ctrl+A but none of these select more than one cell.
I am setting the application theme on launch:
Themes that work: All Fluents, All Material, All VS.
Is this a bug or am I missing something?