Ok!
strange:
i click "+" (add level) on "where" parameter
enter "test2" (param name) and "test2" (default value)
click "Test"
"test2" shows up as "test21" (with the correct value of "test2")
i go back to "Request"
i click "+" (add level) on "where" parameter again
enter "test3" (param name) and "test4" (default value)
click "Test"
"test3" shows up as "test43" (with the correct value of "test4")
Hello! I'm sorry, but it's not reproducible on our end. We tried with different browsers/computers - no luck... Is this issue still reproducible for you?