I checked around and I found what the Texture2D_923_BaseColor is. Landscape > Manage > Selection Tool and click on a component, there is a tab called “Baked Textures” “GI Baked Base Color Texture” and there is the Texture2D_923_BaseColor refereed.
Since the tool-tip said it had something to do with the Distance Field GI I figured it might have something to do with “Generate Mesh Distance Field” I went to Project Settings > Rendering > Lighting where the field for that is and I noticed something new called “Generate Landscape Real-time GI Data”. I unchecked that and the editor no longer freezes for a few seconds. I don’t even remember turning that thing on.
Not sure if I should mark this as fixed or not.