Interleave controller inside if controller does not interleave samplers equally

**mserdur** ([Bug 65434](https://bz.apache.org/bugzilla//show_bug.cgi?id=65434&redirect=false)):
When an interleave controller is inside an if controller interleave is not invoking it's samplers equal times but the first one is called about twice as much as the second one.

Please see a sample project attached

Created attachment [Interleave-inside-if-bug.jmx](https://apache.github.io/jmeter-bugzilla-attachments/34/65434/37945/Interleave-inside-if-bug.jmx): sample project reproducing the issue
Interleave-inside-if-bug.jmx

````xml

false
true
false







continue

false
-1

1
1
false


true



100



groovy


true
import java.util.*;
vars.put("condition", ""+new Random().nextBoolean())

${condition}
false
true



1
false



groovy


true
//



groovy


true
//






false

saveConfig

true
true
true
true
true
true
true
true
true
false
true
true
false
false
false
true
false
false
false
true
0
true
true
true
true
true
true

````

Severity: normal
OS: