I tried to recreate speed typing of this character using a script because I don't have one on my keyboard:
alias test {
if (!$window(@test)) .window -Cde2 @test 0 0 700 500
.editbox @test $+($editbox(@test),$chr(233))
if ($len($editbox(@test)) > 250) { echo @test $editbox(@test) | halt }
.timerTEST -m 1 1 test
}
But the problem could not be identified, all letters are displayed as they should. And in general, I don't find any problems with typing letters in the beta version.
It looks like to recreate this problem, I need a Portuguese keyboard model similar to yours, if it is keyboard related of course, or more like some kind of glitch due to typing speed on such a keyboard model.