Hi I also looked at the release notes to see
if something with Future/Concurrent was changed but nothing popped up.
Well for test. it would be a good test if exact same code just works in say 5.6
and not in 5.10. But being stucked at 5.4 would be not so optimal.
A note about the static.
Just to be sure. the class that expects the Finished signal is a static member of some other class?
As far as i can recall, you cant compile if you try to connect to a static class slot so im inclided to
say that is not the issue.
Since your mini sample works. There must be some difference in the real code. But i cant
think of more to check.