I uploaded my configuration and source file to support.slickedit.com under "ifbrace.tar.gz". My configuration and source file are needed to reproduce.
In my C++ formatting, I have the brace style for "if" statements for "next line":
Tools->Options->Languages->Application Languages->C/C++->Formatting->Edit->Brace Style->Statement Styles->'if' statement blocks->"Next Line"
see attached picture "ifbrace_next_line.png"
In my source file "ifbrace.cc" go to the end of line 78, type <ENTER> and then "if<space>".
After typing the <space> can see that the opening brace for "if" is on the same line instead of next line, see attached screenshot.