-rawsettings ProxyTelnetCommand do not work in URL

ok – winscp.exe ssh://[email protected]/ -rawsettings ProxyMethod=6 ProxyHost=12s
ok – start ssh://root;x-ProxyMethod=6;[email protected]/
ok – winscp.exe ssh://[email protected]/ -rawsettings ProxyMethod=5 ProxyTelnetCommand="ssh -W%host:%port 12s"
bug – start ssh://root;x-ProxyMethod=5;x-ProxyTelnetCommand=ssh+-W%25host%3A%[email protected]/
bug – start ssh://root;x-ProxyMethod=5;x-ProxyTelnetCommand=ssh+-W10.161.115.160%[email protected]/
bug – start ssh://root;x-ProxyMethod=5;x-ProxyTelnetCommand=ssh%20-W10.161.115.160%3A22%[email protected]/

What "bug"? How are you running the start commands?

Please post session log files both from (when executed directly in cmd console):
and

Direct run WinSCP.exe with url is Ok (url.log)
Run WinSCP.exe over url handler WinSCP.exe /Unsafe "%1" is not Ok (startWithUnsafe.log)
Run WinSCP.exe over dirty fixed url handler WinSCP.exe %1 is Ok (startWithoutUnsafe.log)

Reg files winscp-SCP.reg winscp-SCP-withoutUnsafe.reg

Ok, actually, yes that's expected.
Executing random local commands over URL is not allowed. That's the very point of /Unsafe.

Maybe it's easier this way: Restore how it was before: