WinUAE 3.4.0 and 3.4.0 b20 are ok
Problem starts with 3.4.1 b1. There are many changes in that b1 version:
http://eab.abime.net/showthread.php?t=85939
When I uncheck "Cycle-exact (Full)" intro runs.
(There was not 3.4.1 stable because it ends with 3.4.1 b9 and starts with 3.5.0 b10, then next stable is 3.5.0.)