Breakpoint in child-package triggered on first execution only.

I have a child package which is executed several times within the same SSIS ETL. I have placed a break point on one of the child package's tasks, set to trigger on a PreExecute() event. The first time the child package is invoked, the breakpoint is triggered. However, on each successive invocation the breakpoint is ignored. Does anybody know if this behaviour is normal? Thanks in advance!

This is a known issue and we are aware of the bug. Thanks