My answer to the poll is yes/no:
If I may add what I have found:
The first lag of a flight has never been a problem
However, if I do a
consecutive flight, I can't start the engines anymore.
E.g. Gatwick - Manchester;
Manchester - Gatwick.
At about 10'000 feet, I switch on the APU (not engaged). Upon arriving at the gate, I engage the already running APU and switch off the engines.
I don't change anything except for the bleeds/air-conditioning etc before start-up. Now, my engines won't start, although everything is set the way it should be.
My trick: Load the same aircraft again from the menu and it works.
Of course, it would be more satisfactory without that trick.
By the way: Speaking of a "consecutive flight": This shows the addictive potential the CS737 has!