Both miniterm and idf_monitor tries to convert terminal escape codes into windows terminal calls. This is no longer necessary as the default installed windows terminal now supports VT100.
This means one can have much more complex terminal interactions. miniterm already makes the necessary calls to enable it.
I haven't found a simple way to disable it, so I've just modified it to pass through the serial output. I am not familiar enough with the code to make a patch.
More about the windows terminal VT100 support here:
https://learn.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences