Map Editor Minimap Whited Out

• OS & Version: Windows 10 Home
• 64bit
  • RAM: 8 GB
  • CPU: Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz, 3201 Mhz, 4 Core(s), 4 Logical Processor(s)
  • GPU: NVIDIA GeForce GTX 1060 3GB
• Build: v1.6f12

It appears that when I load a map, my minimap turns solid white for some reason. This happens regardless of if the map is a new one created, or an old one loaded in.
Loaded Map: https://steamuserimages-a.akamaihd.net/ugc/809928961041315991/B5AD4043D39363AC8B74F92B6222986E4695DAC8/
New Map: https://steamuserimages-a.akamaihd.net/ugc/809928961041316238/75389C20BDA4618AC0C7677AD2EBC0960A379D05/

Of note, I was unable to replicate this when I quit the game and restarted. The age of the map being loaded seems to have no bearing on this. I am unsure how to duplicate at this time.

New Map, Post-Restart: https://steamuserimages-a.akamaihd.net/ugc/809928961041316475/CFF876D84A85EE2B3121E3DFDB715527D2B248FA/