[BUG] Switch foreach case looses _forEachIndex

[X39]

Describe the bug
Using foreach around a switch containing the case clauses will cause the variable tree to loose the _forEachIndex variable.

To Reproduce
Steps to reproduce the behavior:

1. Execute code below
2. Check output

Expected behavior
2. Output should resemble _testarray

Additional context

private _testarray = [1, 2, 3, 4 ,5, 6];
private _a = 3;
switch (_a) do
{
    {
        case _x: { hint str (_testarray select (_forEachIndex + 1)) };
    } foreach _testarray
};

[X39]

None-Issue as it seems