SEB Query String Parameter works on ?? but not on ?

[RoChess]

On SEB 3.7.1 activated the Exam > "Allow Query Parameter" option.

Adjusted User Interface options to display address-bar, because SEB log files show no entries for startUrl or the Query-Parameter that end up getting loaded/used.

created "seb-test.seb" with https://google.com/ start URL.

Launching it as sebs://example.com/seb-test.seb??query-params resulted in SEB loading https://google.com/?query-params But using sebs://example.com/seb-test.seb?query-params caused SEB to load https://google.com/

Expected behavior was to see https://google.com/query-params in address-bar.

Without log entries, not sure if I'm doing something wrong.