Then, I put a breakpoint at some line, and run the program with F5.

Hi,

Thanks for reporting!

We have had other reports of this behavior on German OS and VS, so this may be the same problem. We're looking into the cause of the problem and if we can find a fix. I unfortunately don't have a timeframe for when we will know, but we'll makes sure to report back here if we find a fix.

Thanks!

--Jens