It seems like a driver issue, which returns 0 available RAM, when Metashape checks for the free RAM prior to the next sub-task.
It was indeed a driver issue. The Latest Adrenalin drivers did not perform at all. I SOLVED the issue by clean installing AMD's enterprise pro drivers:
https://drivers.amd.com/drivers/prographics/win10-radeon-pro-software-enterprise-20.q4-nov10.exeNo more VRAM issues. Project renders out without any problems.
Here are the Driver Details that work for me:
Software Version - 2020.1027.1104.19925
Driver Version - 20.10.27.05-201027a-360165C-RadeonProEnterprise
Provider - Advanced Micro Devices, Inc.
2D Driver Version - 8.1.1.1634
Direct3D® Version - 9.14.10.01443
OpenGL® Version - 26.20.11000.13596
AMD Audio Driver Version - 10.0.1.16
Vulkan™ Driver Version - 2.0.137
Vulkan™ API Version - 1.2.133
Windows Version - Windows 10 (64 bit)