Flow Control Action - Break current loop issues

**eR@SeR** ([Bug 64820](https://bz.apache.org/bugzilla//show_bug.cgi?id=64820&redirect=false)):
Hello,

I noticed that Flow Control Action when Break current loop is checked has unexpected behavior:

1. When used in Loop, While or ForEach controllers which parent is Transaction controller, loop is properly stopped but results are doubled in Listeners. If Generate parent sample is checked or unchecked in Transaction controller, behavior is the same. Runtime controller might be affected too, but cannot be reproduced because of issue under point 2.

2. When used in Runtime controller only, Break current loop actually stops current thread. Last Dummy Sampler in TG2 is not executed.

Check provided jmx file for more info. TG1 point 1 and TG2 point 2.

Jmeter 5.3
Microsoft Windows 10 Enterprise 64-bit
java version "14.0.1" 2020-04-14

Note: There might be more issues for flow control action when Break current loop is used, so if you have time please investigate. Thank you.

Created attachment [TranContrAndBreak.jmx](https://apache.github.io/jmeter-bugzilla-attachments/20/64820/37505/TranContrAndBreak.jmx): jmx file

OS: All