The Emacs failed on clicking mouse-2 to paste, it caused by the mintty respond primer clipboard querying with constant "..;c;...".
Here a simple way to reproduce the issue:

$ echo -e '\e]52;c;?\e\\'
 52;c;aGVsbG8=
$ echo -e '\e]52;p;?\e\\'
 52;c;aGVsbG8=

The "..;p;.." query want a response same as "..;p;..", but mintty respond "..;c;..".

The full steps to reproduce the issue are list as below, in a mintty, ssh to remote ubuntu 22.04, and

1. run "emacs -nw -q"
2. eval "(xterm-mouse-mode)" and "(xterm--init-activate-get-selection)"
3. press middle button on mouse to paste text, it does not work; (press Ctrl+y works)

The bug was reported to emacs mail list https://debbugs.gnu.org/cgi/bugreport.cgi?bug=79592, but located as a mintty issue.