Thanks, Adam! Good to know!
I have come to the same conclusion based on my limited testing. Git bash seems to have issues and Bash (WSL) or the Windows Cmd prompt C:\ terminal seem to work better for the build.
I am using vscode and it was convenient using git bash inside that for many of the initial expo software development and testing commands (such as expo start to connect and initially test code on my iPhone) but looks like I will need to jump out of that to do the final build.
Sur