Bug in QT 5.12 and 5.11.2 Auto complete (Suggestion)

There is a problem in QT 5.11.2 and QT 5.12 the last release in the auto complete when I try to connect SIGNAL and SLOT and I turn on the the auto complete I press Cntrl + Space I not found all the signals and see all the functions, also if i delete it and try to write again it not show anything, so i back again to work with version 5.11.

this the syntax i use to make the connection

connect(object, SIGNAL( here auto complete not work correctly ) , this, SLOT( same ));