When using Powershell to CUI operation Linux on Docker in Docker for windows environment, even if I try to send a signal to Linux with Ctrl + z, it does not work well. It looks like Ctrl + z is assigned to Powershell operations. I leave Linux and return to Powershell operation. The easy solution was to use a "legacy console" in Powershell.
Right-click on the PowerShell bar → select Properties
Check "Use legacy console"
There must be another more elegant solution.
Reference: Windows PowerShell, Control-Z, and Kitematic https://alankent.me/2017/07/04/windows-powershell-control-z-and-kitemati/