Perhaps new tabs creating through ConEmu64.exe commandline going wrong

[esaulenka]

Versions

ConEmu build: 230724 x64
OS version: Windows 10 x64
Used shell version: msys2

Problem description

I faced with the problem when tried to add a new msys2 tab to the running ConEmu.
In short, msys2 have a few different environments. It is selected on the start by setting environment variable MSYSTEM (with values like MSYS, MINGW64, etc) before launching shell.
But as I understood when msys2's startup script launching ConEmu64.exe /Run C:\msys64\usr\bin\bash it uses environment variables got at the first run.

Steps to reproduce

1. close ConEmu
2. run C:\msys64\msys2_shell.cmd -conemu -msys
3. run C:\msys64\msys2_shell.cmd -conemu -mingw64
4. check that both tabs contains Msys2 environment (check $PATH and $MSYSTEM)
5. close ConEmu
6. run C:\msys64\msys2_shell.cmd -conemu -mingw64
7. run C:\msys64\msys2_shell.cmd -conemu -msys
8. now shells become MinGW64

Msys launcher located here: https://github.com/msys2/MSYS2-packages/blob/master/filesystem/msys2_shell.cmd