Sometimes I cannot snap the "exit loop"-block inside a loop (in this case a "for each member of <group>"-loop, I don't know if it happens with other loops as well).
See the first screenshot, it's a behavior that sends a message when all actors of a group are dead. I used a code block with
break;
in there, because I couldn't put the "exit loop"-block there.
The strange thing is when I move the loop outside of the "always"-section, I can snap the "exit loop"-block. (see second screenshot) But now I am not able to move the blocks back to the "always"-section, they refuse to snap.