Act 2 Deset Map bug

Hello, i've just reached a2 cruel on HCSSF and i just got to the desert map on the rolling caravan for the first time in cruel difficulty. I clicked the map and then hit scroll wheel down to zoom out and all of the texture art on the map disappeared. The waypoints are still visible but most of the texture art seems to have vanished. IDK if this same problem happens on normal mode but its just something i have encountered and thought i would report. -thanks.