Basically, Tripwire added a filter for "No Custom Servers" in the server browser.
To make sure that you can see the Custom Servers on the server browser, go to the filters and check "No Custom Servers" first and press Apply. Afterwards, go to the filters again and uncheck "No Custom Servers". This should help with fixing this problem.
To make sure that you can see the Custom Servers on the server browser, go to the filters and check "No Custom Servers" first and press Apply. Afterwards, go to the filters again and uncheck "No Custom Servers". This should help with fixing this problem.