When editing source code the "F1" context help only works for methods with parameters, if the parameters are already filled in the call:

E.g.

QString string; 
string.append({cursor_blinks_here}); // there are 7 overloads !!

If I use CTRL+Space after typing "appe" it will be expanded to "append" and have the cursor in the braces. The tooltip is showing: 1 of 7 ....... possible parameters.
Now I want to press "F1" to get an idea, what the parameters mean.
But I get: "No documentation available"

Ok, move the cursor into "append" and "F1" results in "No documentation available", too.

If I choose a paramter constellation, e.g.

QString string;
string.append("foo"{cursor_blinks_here}); // there are 7 overloads !! 

If I press "F1" ... "no documentation ..."

Now, if I press "F1" while the cursor was moved to be inside "append" I get the help for this exact parameter set I used. Finally
Ok, but a little late.... I already have chosen a version of the 7 and guessed the meaning. No I can check with "F1" if my guessing was right...

I would like to decide which parameter constellation to choose just before I guess.

Wasn't it like this before (in older QtCreators)?