DB Engine :: Memory Table Not Cleared If Created Inside A While Loop

If I create a memory table inside a while loop, I expect that every loop the memory table is (newly) created and thus empty.

But when I test this, I see that on the second, third, ... run the inserted data in the memory table is still present and not cleared.

This can be reproduces with the following code:

DECLARE @tbl TABLE
( [id] BIGINT )
DECLARE @tbl2 TABLE
( [value] BIGINT )
INSERT INTO @tbl
VALUES (1), (2)

[Code] ....

/*
Expectation: twice 11 and 12 in @tbl2
Actual result: three times 11 and 12
*/
SELECT *
FROM @tbl2

Is this a wrong assumption or is this a bug in SQL Server? (Tested on: SQL Server 2014 and 2008).