Exporting raw of terrain in Project browser doesn't show up until Unity is refocused. Refer the attached video

Steps to reproduce:
1) Create a new project
2) In Project Browser, Right-click > 3d Object > Create Terrain
3) Terrain Settings > Export raw > Save in Project Browser

Actual result: Project browser doesn't show up exported raw of terrain until Unity is refocused
Expected result: Project browser shows exported raw of terrain

Occurring on: 2020.1.0a1, 2019.3.0a12, 2019.2.0f1, 2019.1.0f1, 2018.3.9f1, 2018.2.18f1

Environment: Both Windows and Mac